Tyson Adams

Putting the 'ill' back in thriller

Archive for the tag “Sciency”

Reading is good for the brain…. d’uh

I may have mentioned it before, but I am a science nerd. It may also be painfully obvious that I like reading. And before you ask, yes I do wear glasses and own a lab coat. I can fancy dress as anything from a doctor to a scientist.

What I love about science is the way it goes about trying to understand the universe. In fact science even came up with a few studies on how reading is fantastic for you. Psychologists from Washington University used brain scans to see what happens inside our heads when we read stories. They found that ‘‘readers mentally simulate each new situation encountered in a narrative”. The brain weaves these situations together with experiences from its own life to create a mental synthesis. Reading a book leaves us with new neural pathways – although that’s hardly surprising nor unique.

Nicole Speer, also from Washington University, utilized brain-imaging to look at what happens inside the brains of participants while they read. She discovered that as people read, they are constructing a virtual reality inside their heads every time they read. That’s a fancy way of saying they imagined the stuff they were reading.

A reader’s brain in action.

So. The book is better… Who’d have thunk?

It is good to have some evidence that our brains get more out of reading. Without evidence, claims are not worth the air they consume. Just ask anyone who has tried to get conspiracy theorists to provide evidence for their claims.

Another study scanned readers’ brains to see how reading compared to web browsing (reading plus).*

Each volunteer underwent a brain scan while performing web searches and book-reading tasks.

Both types of task produced evidence of significant activity in regions of the brain controlling language, reading, memory and visual abilities.

However, the web search task produced significant additional activity in separate areas of the brain which control decision-making and complex reasoning – but only in those who were experienced web users. (Source)

Brain activity in a personal not used to using the web while reading

Brain activity in web newcomers: similar for reading and internet use
Surfing the net brain in action.

The researchers said that, compared to simple reading, the internet’s wealth of choices required people to make decisions about what to click on in order to get the relevant information. So not only is reading good, but exploring and interacting with what you are reading is even better. Surfing the net, getting lost in a fictional world…. wait that is the same point twice. Anyway, it leads to even more brain activity.

Now before you all go in search of internet porn to enlarge your brain, remember that you’re meant to be reading the porn sites for the articles.

 

* It took me a bit of searching to find the original journal paper for this study. The BBC article and original press release were easy. A personal gripe of mine is when press releases and news articles fail to link to the original article so that we can fact check the claims. So as part of growing your brain with reading and internet browsing, please spend some time searching for and reading the original scientific papers that are reported. And if it wasn’t peer reviewed, then it could have been made up, like that rubbish about us only using 10% of our brain.

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Science writing explained

stand-back

Have you ever heard a scientist talk and wondered what the hell they were saying? Did they use the word theory to mean something other than “I reckon”? Well, you’re not alone.

Language is very important to scientists. Without precise language there would be no way for them to write peer reviewed papers that could send an insomniac to sleep. Communicating science is all about letting everyone in on the data and knowledge that is being accumulated in the endless march forward into the unknown. But because scientists are marching into the unknown, they prefer to make their statements as vague and non-committal as possible. This way, if they are correct they have cautiously alluded to the right answer, and if they are wrong they can pretend their statement was hinting at the correct answer all along.

In keeping with my previous explanations of music reviews and book reviews I have found a chart explaining science terms. This list has helped me, I hope it helps you too.

That isn’t literature too

Paradox - another word for idiocy

I recently reblogged an article from The Conversation about how awesome the Harry Potter books are, but how snobby (some?) literary people are about them. The vitriol and chastisement of the Harry Potter books reminds me of a time when I too was not on the Potter bandwagon. Oh how wrong I was.

Stupid kid’s books. It’s just The Worst Witch with a Chosen One narrative. That’s not literature!

And once again we come to my favourite book chest thumping topic. How worthy is Harry Potter and how wrong have the snobby people been about it?

I think it is worth addressing a few of the arguments that are levelled at JK Rowling and genre fiction in general. Let’s use Rowling as a stand in for all genre authors. Because all genre authors are just as successful and beloved…

Mostly the arguments revolve around Rowling not having the correct goals in her writing. Of course, these supposed goals are rather arbitrary and change depending upon who is deciding what Rowling’s goals should be. Because apparently writing an entertaining book series that sells hundreds of millions of copies, has devoted fans, promotes laudable social principles, and got some kids reading books who wouldn’t have otherwise isn’t enough for some people. They also tend to expect the world from the Harry Potter books, something that I’ll delve into further below.

Take for example this piece by Nicholas Lezard in The Guardian:

Do I need to explain why that is such second-rate writing?

If I do, then that means you’re one of the many adults who don’t have a problem with the retreat into infantilism that your willing immersion in the Potter books represents. It doesn’t make you a bad or silly person. But if you have the patience to read it without noticing how plodding it is, then you are self-evidently someone on whom the possibilities of the English language are largely lost. Source.

Ugh. I’ve got two words for you, Nicholas Lezard, and they are what your mum should have said to your dad on that fateful day.

There is so much to unpack in that small quote. Lezard starts by insulting fans of the books, then says he isn’t insulting them, then insults them again. Someone who could write a paragraph such as this is self-evidently someone upon whom the possibilities of the English language are largely lost. He’s insulting the use of speech identifier verbs whilst failing to understand the audience and style being utilised. If you expect YA to be using the same style as the Man-Booker winners you’re gonna have a bad time.

if-you-didnt-read-the-title-first_fb_526920

But why insult fans, young and old, of the series? Why insult Rowling? Although she is probably insulated from such lowly criticism in her gold-lined money castle. He didn’t like something, he can critique it, but he is forgetting that a literary critique stands on argument, not insulting people for disagreeing with him.

This speaks poorly of Lezard and other such critics. In a previous post I discussed literary people defending Fort Literature from the invading Lesser Works. But this is Lezard leading a charge against the peaceful village inhabited by the Lesser Works. He has marked himself the despotic bigoted scourge of Fiction Land, seeking to crush all those who would dare be different from him.

Other critics of Harry Potter have argued that the series didn’t do enough to change the world. This piece comes from the unsupported opinions at The New York Times:

But in keeping with the intricately plotted novels themselves, the truth about Harry Potter and reading is not quite so straightforward a success story. Indeed, as the series draws to a much-lamented close, U.S. statistics show that the percentage of youngsters who read for fun continues to drop significantly as children get older, at almost exactly the same rate as before Harry Potter came along. Source.

Of course, the problem with this argument is that it requires one series by one author to change the lives of all kids worldwide… The article itself cites the series as having sold 325 million copies worldwide in the decade since the first book’s release (a third of that in the USA alone). Out of the 1.9 billion kids and 7 billion people in the world that means only 17% of kids, or 4.6% of people have bought a Harry Potter book (because nobody ever bought the whole series, or two copies of one of the books, or saw a copy in a library). To put that 325 million copies for the entire series in perspective, roughly 175 million people paid to see A film in the cinema that was tenuously about cars. A similar number paid to see the final Harry Potter film. Let’s face it: reading isn’t that popular.

Let’s break this amazing phenomenon down a bit further. There have been several studies that have looked at readers, particularly kids, and how many of them have read the books.

Percentage of kids reading each Harry Potter book

Source

This is a small survey of children (N = 233) looking at Harry Potter fans, but is consistent with other studies and with a Waterstones reader survey the researchers used to validate the small study. You can see that most kids had read the first book, but that quickly dropped off as the series continued. The studies showed that only 25-35% of kids had read all 7 books in the series, with the average fan reading 3.98 books in the series.

Another thing to note is that studies have also found that 46% and 49% had read a Harry Potter book. Or to put it another way, over 50% of kids hadn’t read any Harry Potter books, and many had only tried one (usually the first one). The most popular book series of all time still isn’t read by a majority of people.

But what about JK Rowling’s influence on reading?

This study was of only 650 kids, but it does illustrate that particularly amongst secondary school kids that they were inspired to read. More books, more difficult books, and more fiction – and if someone can point out the difference between non-fiction and fiction I’d much appreciate it.

Another study of a similar size found supporting results:

Many, though not all, of our enthusiasts consider the Potter books a major contributor to both their self-identification as readers and their wider literacy development. Perhaps the most striking change they reported was the confidence and motivation to try more challenging books or more books in general. Thus, the Potter books—particularly the thicker ones—acted as a “Portkey” or “gateway,” transporting readers into the world of more mature fiction. Source.

The increasing complexity and length of the books was cited in both studies as giving people confidence to grow as readers. But it was also noted that one of the reasons given for not reading all of the books in the series was also the increasing complexity and length. In other words you can’t please everyone, especially not kids. Unless you have ice-cream. And the kids aren’t lactose intolerant.

So the problem isn’t that the books are second-rate, nor that they aren’t encouraging people (kids are people too) to read. The problem is that even the most popular book series ever is going to have a limited impact. Rowling has managed to connect with a huge audience – for a book – which has had positive impacts on readers, such that they are more likely to go out and read more books, even the more complex books that keep the literary snobs in a job.

It is a big ask to expect one book series to have improved literacy rates. At the risk of labouring the point – any further – most people don’t read, and most people who do read won’t have read Harry Potter. The problem isn’t Rowling failing to inspire people enough. It isn’t that she wasn’t a good enough writer. The problem is that people love to make lazy attacks on genre fiction. They don’t want to admit that reading is not that popular and that what we have been doing is probably not encouraging new readers. At least Rowling was on the right track.

Pen vs Keyboard: FIGHT!!

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For some reason the world of writers is filled with technophobic troglodytes intent on proving that their old-fashioned way of doing things is better. I’ve written previously about how older people’s favourite hobby since the dawn of time has been complaining about kids these days. This is also true of changes in technology, with people intent on justifying not learning to use a computer or e-reader. Because cutting down trees is the future of communication!

Once again I’ve stumbled across another article that misrepresents scientific studies to try and convince people that we need to clear forests, pulp them, flatten them into paper, cover them in ink, and act as snooty as possible. This time they – the nebulous they: my nemesis!! – are trying to pretend that taking notes with a pen is better than using a keyboard.

Ugh.

When will people learn that paper isn’t the medium we should be promoting? We need to be going back to scratching on rocks and cave walls. When was the last time a paper book lasted more than a hundred years out in the rain, snow, and blazing sun? That doesn’t even begin to compete with the longevity of the 50,000 year old cave paintings. Data retention for rock far surpasses the much inferior paper.

This isn’t the first article I’ve seen on The Literacy Site misrepresenting science. Hopefully they will acquire come scientific literacy soon and overcome their biases. If I turn blue and pass-out, try to act concerned. Let’s dive in.

New Research Explains How The Pen Is Mightier Than The Keyboard

It’s great when articles improve on the titles of science papers. I mean, who wants to read the science paper The Pen Is Mightier Than the Keyboard: Advantages of Longhand Over Laptop Note Taking? Pity that both titles misrepresent the actual findings. Also, is 2014 still regarded as new?

In her graduate assistant days, psychological scientist Pam Mueller of Princeton University used to take notes just like everyone else in the modern age: with a computer. One day, Mueller forgot her laptop and had to take notes the old-fashioned way. Rather than being held back by pen and paper, Mueller left class feeling as if she’d retained far more information than usual on that day. She decided to create a case study that could prove her hunch that writing longhand was actually better for comprehension than typing.

This is actually a good little story and illustrates how a lot of hypotheses are formed in science. This is the anecdote or observation that scientists want to turn into a hypothesis to create actual knowledge. But remember, this is an anecdote, which has as much value as used Easter egg wrappers that have been stuffed between the couch cushions. Putting anecdotal stories at the start of an article can set the audience up to not think too hard about the rest of the article, as you have given them the conclusion in a nice little story.

The study she created, published in Psychological Science, indicated that taking notes by hand is a more effective method than typing them on a laptop when it comes to processing information conceptually.

And here we jump straight off the rails, over the side of the bridge, and careen into the waiting river below. Sure, The Literacy Site is just quoting the press release, but that is lazy. The study itself has this line in the abstract that show how this claim is a misrepresentation of the findings:

We show that whereas taking more notes can be beneficial, laptop note takers’ tendency to transcribe lectures verbatim rather than processing information and reframing it in their own words is detrimental to learning.

In other words, the findings were that people spend all their time typing and no time actually listening and comprehending the lectures. Because the pen is an archaic device that is unwieldy and slow compared to the keyboard, students using a pen only write down notes after they have listened, picked out the key points, and conceptualised that information into a note. But don’t take my word for it, the press release on the University of Michigan website has a few recommendations including:

  • To interrupt verbatim note-taking on laptops, break up your lectures with short activities that encourage deeper processing of information.
  • Have students use laptops or other technologies to process–not just record–information.

Now it is time to discuss the study details a little bit, because someone might be interested in the methods section. I’m sure those people exist. Somewhere. Interested is probably the wrong word.

In the first of a series of studies led by Mueller, 65 college students watched various TED Talks in small groups, and were provided with either pens and paper or laptops for taking notes. When the students were tested afterward, the results were overwhelming. While the groups performed equally on questions that involved recalling facts, those who had taken longhand notes did significantly better when it came to answering conceptual questions.

Sorry, I need to catch my breath. I’m so shocked at the massive sample size. This is definitely enough people to represent the rest of society. Conclude away I say!

Anyway, these overwhelming results are just a tad whelming.

Whelming error bars.

Whelming error bars.

As you can see the performance on retaining facts was the same, with error bars that suggest 65 people is probably not enough to draw conclusions from. Not that anyone would be trying to claim this study is proof of anything, right? The next thing you see is the benefits of using a pen…. as long as you ignore those error bars and just accept the p-value tells us something of value. Given that those error bars overlap for the two groups, I wouldn’t be drawing conclusions from a p-value. Also, I’m not exactly sure why an ANOVA was used when there were only two groups to compare. KISS principle applies to statistics as well.

Now the study realised that 65 people wasn’t enough, so they repeated the study with a few variations twice more. In the second and third tests they had 151 and 109 people take notes. Each test had the typists writing between 250 and 550 words, whilst the pen wielders wrote roughly 150 to 400 words. Interestingly the note takers were writing verbatim 12-14% with their laptop but the pen users only managed 4-9% verbatim. This shows why the conclusions I’ve quoted above were drawn.

Out of interest, here are the results from the other two tests that were more convincing for that conceptual finding.

Okay, this is more like it.

Okay, this is more like it.

The second test with 151 people were tested with pen, laptop, and laptop with a lecture from the tester about how they really should pay attention. With 50 people per group you’d hardly jump up and down about the significance of this test, but clearly telling people to pay attention doesn’t… hey look a squirrel.

squirrel

Methinks possibly the greater number of treatments has lessened this test's results.

Methinks that possibly the greater number of treatments has lessened this test’s significance.

The third test with 109 people again tested for pen vs keyboard, but this time they allowed revision of notes before being questioned. This makes the groups even smaller, and again I’d question the significance of such a small sample. But the researchers summed up the results with this erudite paragraph:

However, a more nuanced story can be told; the indirect effects differ for conceptual and factual questions. For conceptual questions, there were significant indirect effects on performance via both word count and verbatim overlap. The indirect effect of word count for factual questions was similar, but there was no significant indirect effect of verbatim overlap. Indeed, for factual questions, there was no significant direct effect of overlap on performance. As in Studies 1 and 2, the detriments caused by verbatim overlap occurred primarily for conceptual rather than for factual information, which aligns with previous literature showing that verbatim note taking is more problematic for conceptual items.

In other words, doing lots of writing, particularly just copying what was said verbatim, makes you suck at understanding what the hell is going on. Oh, and study before the test. Apparently it helps too. Made that mistake at university.

So back at The Literacy Site they are skipping the other tests and just heading to the conclusions:

Mueller found that this was the result of laptop users trying too hard to transcribe the lecture rather than listening for the most important information and writing it down by hand. It may be an era where computers have made handwriting seem useless, but Mueller isn’t the only believer in the importance of longhand.

Notice the nuanced difference that seeing all three tests provides? We could be led to believe that there was overwhelming evidence for the pen, but what we see is that note takers need to readdress their methods of taking notes. Or they could just wing it.

An article in TIME discusses Karin James, an Indiana University psychologist, who published a 2012 study indicating writing is particularly important in the cognitive development of pre-literate children five and under. While using a computer for note-taking in some situations makes sense, it’s important not to overlook the longhand method.

It’s great that the article tries to incorporate some extra research. Citing one study with a small sample size is hardly compelling, certainly not worth writing an article about. But again the research is being misrepresented:

…the benefits of writing: increased creativity, better critical thinking, boosted self confidence, and a correlated improvement in reading capability with writing prowess.

But are these benefits real? The short answer: Mostly not. “There’s lot of caveats in handwriting research,” says Karin James, a psychologist at Indiana University

Curse those damn caveats! Why can’t we have a control group of kids we don’t teach to read and write?!

Which brings me to a final point about these old technologies vs new technologies articles: stop jumping the gun! We’re in a transition phase. This isn’t 1970s velvet suits with platforms versus 2010s hipster atrocities. This is typewriter hipster texting on his phone. Technology is changing and we’re still learning how to use it properly. The studies that are cited in many of these articles have very limited scope, test very few people, and are comparing new and established things. Has anyone taught laptop users to take notes effectively for the new medium? Do you actually need to take written notes at all in this modern age? We need to see more science done on the changes taking place, and we need the articles discussing the science to do more than discuss (one study from) one paper, and highlight the limitations. Well, unless you have already made up your mind about a topic and just want some links to throw at people in an argument. Screw being right!

This blog post is being shared online, in print, and carved into a cave wall. Comment below which format you preferred receiving it in.

 

How to spot anti-science nonsense

Just recently I was asked a question on one of my climate change posts. The question, whilst not about climate change nor climate science, was about similar anti-science nonsense that acts to confuse and befuddle those who aren’t familiar with the field. The comment in full:

I like your writing, I wish more would understand your logic when they spout facts and relationships. If you have time please, an article (though imperfect) comments,

“Bacteria…and plants use a seven-step metabolic route known as the shikimate pathway for the biosynthesis of aromatic amino acids; glyphosate inhibits this pathway, causing the plant to die…. Monsanto says humans don’t have this shikimate pathway, so it’s… safe……however, that our gut bacteria has this pathway, and these bacteria supply our body with crucial amino acids. Roundup …kills bacteria, allowing pathogens to grow; interferes with the synthesis of amino acids including methionine, which leads to shortages in critical neurotransmitters and folate; chelates (removes) important minerals like iron, cobalt…”

I would love to know your take on that possible cause and affect.
Thank You for your Time !
Dennis Buchanan

Reference : http://healthimpactnews.com/2014/mit-researcher-glyphosate-herbicide-will-cause-half-of-all-children-to-have-autism-by-2025/

Dennis has asked how likely it is that this sciency sounding article is correct. The short answer is that you are more likely to get this week’s lottery numbers from one of these articles than any reliable facts. How can I be so dismissive? Well the thing is I’m not being dismissive, it just sounds like that because my skeptical science eye has spotted many holes in the quote and article. So let us go through them like a rugby player at an all you can eat buffet.

The source.

The first thing to note is the source of the article and the “expert” cited within. There are some tell-tale signs that a webpage may be unreliable, such as when they use terms such as “truth”, “natural”, “alt” as a prefix to any word, and “health” as their names. Health Impact News isn’t the giveaway here, it could be a legitimate source of information. In this case the giveaway is the byline “News that impacts your health, that other media sources may censor.” See: it’s a conspiracy!!! (Font = sarcasm) And conspiracy claims are always reliable (/sarcasm).

If you check out Web of Trust you can see that Health Impact News perpetuates a number of dubious and fraudulent claims, such as vaccine myths from the anti-vaxxer nutters. Which means that the slant the website is running is one that doesn’t respect scientific evidence. Not that this alone is enough to dismiss the claims.

The other source is the “expert” cited, one Stephanie Seneff. To say that this computer scientist is out of her depth in the field of health, genetics and chemistry is like suggesting Justin Bieber’s music is appealing to people with taste. She makes all sorts of wacky and unfounded claims about herbicides, GMOs and Monsanto, so calling her an expert or citing her work should get you laughed out of any room you are standing in.

The claim.

What the article claims is really the crux of the dismissal. If someone claimed to have seen bigfoot doing lines of blow with someone other than Charlie Sheen, we’d be immediately suspicious since we know that greater than 90% of all cocaine is snorted in the company of Sheen. Similarly when someone claims that the most extensively tested herbicide of all time, the safest agrichemical ever made, the most widely used agrichemical on the market, is responsible for [insert health consequence here, in this case autism] then you should be a tad suspicious.

Let’s ignore the fact about the extensive safety testing. Let’s also ignore the fact that autism seems to be the disease de jour of the alt-health fear-mongers, linked to everything from GMOs to vaccines. Let’s also ignore the fact that agrichemical safety and efficacy have virtually nothing to do with the safety and efficacy of individual GMOs (GM and GE being another kettle of fish entirely), despite what the article tries to imply. Let’s also ignore that glyphosate binds tightly to organic matter and is rapidly broken down in the environment so actual levels consumed will be negligible, and those amounts won’t be doing anything in the digestive tract. Let’s just assume that glyphosate is getting into our bodies and causing damage at huge levels: what evidence is there to suggest it is glyphosate and not any other agrichemical or environmental toxin that has increased during the same time period (e.g. coal pollution)? What evidence is there to suggest there has actually been any rise in maladies that aren’t as a result of something else (because everyone knows that fat people got fat whilst only eating celery sticks)?

The reference material or evidence.

Big claims require even bigger evidence. Solid evidence. One thing I hate about news sites is that they so often make oblique references to a study that may or may not have been published in a reputable journal, rather than just link straight to the journal and paper in question. In this case there is no link to a journal, reputable or not, just links to other unreliable sites such as The Mind Unleashed and The Alliance of Natural Health USA webpage, as well as a Youtube video. So far I’m underwhelmed.

Remember, this article is reporting on Seneff’s claim that half of all people will be autistic by 2025 thanks to herbicides. Half!! This is a condition that has a median occurrence of 62 cases per 10,000 people. The spectacular rise in autism that we should expect in the next decade for a herbicide that has been in wide use for many decades already would require a bit more evidence than “well, we reckon.” Seneff claimed a correlation between glyphosate use and a rise in autism. She clearly didn’t compare the rise in autism to organic food.

Damned organic food giving kids autism!!

Well, if you dig further into the reference of the reference (seriously, how hard is it to cite your sources properly!?!) you will find an actual journal paper by Seneff and Samsel in a journal called Entropy. Have you heard of Entropy and is it recognised as a go-to journal for science on the topic of, well, anything? Nope. And what about the study itself which claims that just about every malady you can think of is linked to glyphosate, what evidence does it present? Well pretty much none. To quote this article:

The evidence for these mechanisms, and their impact on human health, is all but nonexistent. The authors base their claim about CYP enzymes on two studies, one of liver cells and one of placental cells, which report endocrine disruptions when those cells are exposed to glyphosate. Neither study is CYP-specific (The effect of pesticides on CYP enzymes, by contrast, has been studied specifically.) As for the gut bacteria, there appears to be no research at all on glyphosate’s effect on them.

Samsel and Seneff didn’t conduct any studies. They don’t seem interested in the levels at which humans are actually exposed to glyphosate. They simply speculated that, if anyone, anywhere, found that glyphosate could do anything in any organism, that thing must also be happening in humans everywhere. I’d like to meet the “peers” who “reviewed” this.

Yep. That is a rebuttal from a Huffington Post article. Let that sink in for a moment. Even Huff Post don’t want to touch Seneff’s claims with a ten foot pole.

So far we have found that the suspicions about this article are well founded. The site is not reliable, the “expert” cited is not reliable, the sources cited are not reliable, the evidence cited is essentially non-existent, the claims made are not particularly plausible, and there is no evidence to support the claims. But this leaves us with a problem: short of hours of research on each point made, how do I confirm that these people are lying to me on the internet? Because you should be able to trust the internet, right?

The rebuttal.

The average person can’t be expected to be an expert in all topics, nor be expected to have the time to track down and read every piece of science to confirm an article is accurate. But there are people on the internet who have their favourite topics that they will write (or make videos) about. This means you just have to search for rebuttals to articles. Google can be handy for this if you are familiar with how to weed out the rubbish results. Joining forums or following experts in various fields can help as well (e.g. Skeptics Stack Exchange, Science Based Medicine). There are also webtools available to help find good information. I’ve already mentioned Web of Trust above, but there are many others.

rbutr is one such tool that can help with finding rebuttal articles (disclaimer: I am involved with rbutr on social media). In the case of the Health Impact News article there were two linked rebuttals (I’ll be adding this one as well), here and here. This really helps to figure out whether the arguments presented are valid (although in this case a basic application of logic should suffice). But there were more rebuttals linked to the Seneff journal article, 7 of them: here, here, here, here, here, here, and here. These links allow people to easily see the arguments laid bare.

Thus we can now see that the article can be dismissed as rubbish. A fair bit of work to get there, but in the end we did it (~25 references and 1600 words later). Makes installing rbutr and Web of Trust in your web browser look like a great option, doesn’t it!

In the information age ignorance is a choice. But informing yourself isn’t as easy as just reading articles on subjects. Using a critical eye, applying logic, and accessing quality information has to be done to avoid being misinformed. When all said and done, evidence wins. And cat videos. And dog videos. In fact any video featuring a cute animal wins.

Skeptically Challenged

Skeptically Challenged 19 Oct 2014
I’ve been quite busy recently. There is the usual writing going on, but I also have a few articles in the works, another rugrat in the works, and I’ve also been interviewed for the Skeptically Challenged Podcast.

In the podcast, Ross, Ketan and myself discuss a range of topics and try to bring the science. Ketan discusses the mythical wind turbine syndrome, I discuss a recent climate paper, and we cover the promises of fusion power from Lockhead Martin and the recent Ebola hysteria.

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Consider supporting Skeptically Challenged on Patreon;
http://www.patreon.com/skepticallychallenged

Ross Balch

Ross Balch

Tyson Adams

Tyson Adams

Ketan_Profile

Ketan Joshi

 

Ross: https://twitter.com/skep_challenged

Ketan: https://twitter.com/KetanJ0

Edit: Ross and I discussed a couple of other topics in the session below: Supplements and Atheists in Rehab.

DOWNLOAD AUDIO

Discussed topics:

http://www.ncbi.nlm.nih.gov/pubmed/25043597

https://twitter.com/The_MartinL/status/522865867529265154

http://theness.com/neurologicablog/index.php/lockheed-martins-fusion-reactor/

http://www.rawstory.com/rs/2014/10/calif-atheist-awarded-2-million-after-being-re-jailed-for-refusing-faith-based-rehab/

http://www.washingtonpost.com/blogs/wonkblog/wp/2014/10/13/the-inevitable-rise-of-ebola-conspiracy-theories/

http://www.washingtonpost.com/news/the-intersect/wp/2014/10/17/what-was-fake-on-the-internet-this-week-ebola-edition/

http://doubtfulnews.com/2014/10/black-eyed-child-crazy-is-for-the-extremely-gullible/

http://etwasluft.blogspot.com.au/2014/10/alan-jones-declares-at-least-219000.html

http://www.climatecouncil.org.au/pause-in-warming-debunked

New Captain Disillusion Video! – http://youtu.be/h0pIZH-W6b4?list=UUEOXxzW2vU0P-0THehuIIeg

Some links to the material I was name dropping:
http://blog.hotwhopper.com/2014/10/anthony-watts-has-found-another.html
http://www.climatechange2013.org/images/report/WG1AR5_Chapter10_FINAL.pdf
http://www.skepticalscience.com/climate-sensitivity-advanced.htm
http://www.politicususa.com/2014/10/16/rush-limbaugh-admits-causing-panic-ebola-gop-win-midterm-elections.html

Also, stay tuned until the very end and you’ll hear just one of the bits that Ross will have for subscribers, mainly jokes. Now just imagine how we managed to work rocket powered Miley Cyrus into the discussion.

I think you’re Mythtaken: Guns #2 – The second armour-piercing round

After a recent discussion about gun myths, I realised that my last blog post hadn’t covered anywhere near enough of the myths that are floating around (this article will mainly be about US guns, but parallels from the resources and science cited can be drawn to other countries). This is obviously because stuff is much easier to make up than to research, just ask Bill “tides go in, tides go out” O’Reilly. One of the big problems with research in the US on guns is that the National Rifle Association has effectively lobbied to cut off federal funding for research and stymieing data collection and sharing on gun violence. As a result there are a lack of hard numbers and research often tends to be limited in scope. Scope: get it? So like a lost rabbit wandering onto a shooting range, or a teenager wearing a hoody, it’s time to play dodge with some of these claims.

Myth: Guns make you safer, just like drinking a bit of alcohol makes you a better driver.

The myth I hear the most often is that guns make you safer;  just like the death penalty is a great deterrent, surveillance cameras stop crime, and the internet is a good source of medical advice. The problem with this myth is that people like having a safety blanket to snuggle. What they don’t realise is that guns don’t make you safer, they make you 4.5-5.5 times more likely to do something stupid to someone you know and love than be used for protection.

I want to be clear here: there’s nothing wrong with going shooting at the range, or hunting vermin. The problem is thinking that you can use a gun for self-defence, when it actually makes the violence problem worse. That gun escalates the violence because people have it there: why not use it? To wit the criminals enter into an arms race and a shoot first policy.

Owning a gun has been linked to higher risks of homicidesuicide, and accidental death by gun. For every time a gun is used in self-defense in the home, there are 7 assaults or murders, 11 suicide attempts, and 4 accidents involving guns in or around a home. 43% of homes with guns and kids have at least one unlocked firearm, and in one experiment it was found that one third of 8-to-12-year-old boys who found a handgun pulled the trigger, which is just plain unsafe.

As for carrying around a gun for self-defence, well, in 2011, nearly 10 times more people were shot and killed in arguments than by civilians trying to stop a crime. In one survey, nearly 1% of Americans reported using guns to defend themselves or their property. However, a closer look at their claims found that more than 50% involved using guns in an aggressive manner, such as escalating an argument. A Philadelphia study found that the odds of an assault victim being shot were 4.5 times greater if they carried a gun. Their odds of being killed were 4.2 times greater.

It is even worse for women. In 2010, nearly 6 times more women were shot by husbands, boyfriends, and ex-partners than murdered by male strangers. A woman’s chances of being killed by her abuser increase more than 7 times if he has access to a gun, and that access could be the woman keeping one around just in case her attacker needs it. One US study found that women in states with higher gun ownership rates were 4.9 times more likely to be murdered by a gun than women in states with lower gun ownership rates; funny that.

There is also the action hero delusion that often gets trotted out when talking about guns for self-defence. The idea is that everyone is a good guy, so give them a gun and you have a bunch of action heroes ready to fight off the forces of evil. This has worked so well that all governments are thinking of getting rid of the military….

The reality is that the average person is not an action hero and would fail miserably in a high stress situation with actual bad guys. You only have to look at the statistics:

  • Mass shootings stopped by armed civilians in the past 30 years: 0
  • Chances that a shooting at an ER involves guns taken from guards: 1 in 5

I’ve seen several examples cited of “citizens” shooting someone who looked intent on killing everyone they could (with a gun…). But in every instance the “citizen” was actually an off-duty police officer, or a person in law enforcement, or someone in the military. In other words, the people who stop mass shootings or bad-guys with guns, are trained professionals.

There have also been a few studies done that claim X million lawful crime preventions, therefore guns must be good; notably by researchers Lott and Kleck. To say that their research is flawed is like saying Stephen King has sold a few books. Lott’s work has been refuted for extrapolating flawed data. Kleck’s research has similarly been refuted by many peer reviewed articles:

Myth: Guns don’t kill people, people kill people, quite often with a gun, because punching someone to death is hard work.

If this myth were true we wouldn’t send troops to war with weapons. I get where people are coming from with this myth, because the gun itself is an inanimate object and is only as good or bad as the person using it. Yes, I did just quote the movie Shane: thanks for noticing. But here is the thing, in a society we are more than just a bunch of individuals, we are a great big bell-curve of complexity. So when you actually study the entire population you find that people with more guns tend to kill more people—with guns. In the US, states with the highest gun ownership rates have a gun murder rate 114% higher than those with the lowest gun ownership rates. Also, gun death rates tend to be higher in states with higher rates of gun ownership. Gun death rates are generally lower in states with restrictions such as firearm type restrictions or safe-storage requirements.

ownership-death630
Sources: 
PediatricsCenters for Disease Control and Prevention

Gun deaths graph: The three states with the highest rate of gun ownership (MT, AK, WY) have a gun death rate of 17.8 per 100,000, over 4 times that of the three lowest-ownership states (HI, NJ, MA; 4.0 gun deaths per 100,000).

The thing is that despite guns being inanimate objects, they affect the user/owner’s psyche. It’s like waking up one morning with a larger penis or bigger boobs: you not only want to show them off, you act differently as a result. Studies confirm this change in behaviour. Drivers who carry guns are 44% more likely than unarmed drivers to make obscene gestures at other motorists, and 77% more likely to follow them aggressively. Among Texans convicted of serious crimes, those with concealed-handgun licenses were sentenced for threatening someone with a firearm 4.8 times more than those without. In US states with Stand Your Ground and other laws making it easier to shoot in self-defence, those policies have been linked to a 7 to 10% increase in homicides.

Now people also like to try and red herring the argument against guns by pretending that video games or mental health is the problem. The NRA tried to claim video games were to blame after the Newtown shootings. Of course we’d be able to see this relationship by looking at gun ownership versus video game playing, like by comparing the USA to Japan.

United States Japan
Per capita spendingon video games $44 $55
Civilian firearmsper 100 people 88 0.6
Gun homicidesin 2008 11,030 11

Sources: PricewaterhouseCoopersSmall Arms Survey (PDF), UN Office on Drugs and Crime

The thing is controlling guns has been shown to work, although there are other factors in play, and policing is still key. But when gun control has been shown to reduce firearm deaths by 1-6 per 100,000 then the case is pretty much closed.

Myth: They’re coming for your guns to stop our freedom and tyranny and democide and Alex Jones said so and aliens made me do it!

As I stated above, the statistics on guns and gun violence is hazy. No one knows the exact number of guns in America, but it’s clear there’s no practical way to round them all up (never mind that no one in Washington is proposing this). Those “freedom” loving gun owners – all 80 million of them – have the evil government out-gunned by a factor of around 79 to 1. If government were coming for the guns, you’d think they’d have done so before being this grossly out-gunned.

guns-owned630Sources: Congressional Research Service (PDF), Small Arms Survey

Yes, 80 million gun owners is a minority! I find it interesting that from 1989 to 2000 there was a decline in gun ownership of 46% to 32%. Now the decline in ownership rebounds to hover between 34 and 43% for 2000-2011 (notably the high point in 2007 was after the Virginia Tech shooting which the NRA did a lot of campaigning around), which shows why the decline didn’t continue. Now compare those rates of ownership to the recent report from the US Bureau of Justice Statistics sums up the rates of gun violence. You can clearly see a decline in gun violence from 1993 to 2000 before a plateau that has pretty much held since. This is confirmed by other studies. This is an important take home point: all the research shows violence and gun violence is on the decline. The idea that people need a gun for protection is becoming more and more ridiculous. This is despite the global decline in violence, and trends seen in countries like Australia (more Aussie stats here). On a side note, in the last lot of statistics you see that the more female, educated, non-white, and liberal you are, the less likely you are to own a gun. 

So scare campaigns may work to boost sales of guns for a while, but overall, most people don’t want or need a gun. The long term trend has nothing to do with the government coming for the guns and everything to do with people realising they don’t need one and prefer to read a good book, or watch a movie, instead of going to the range.

The simple fact is that more guns in society is the best predictor of death, thus it is time to rethink the reasons for owning a gun, especially if that reason is in case you have to John McClane a situation.

More mythbusting gun articles:

https://www.scientificamerican.com/article/more-guns-do-not-stop-more-crimes-evidence-shows/

http://www.latimes.com/opinion/op-ed/la-oe-hemenway-guns-20150423-story.html

http://thinkprogress.org/gun-debate-guide/#moreguns

http://www.slate.com/articles/health_and_science/medical_examiner/2015/01/good_guy_with_a_gun_myth_guns_increase_the_risk_of_homicide_accidents_suicide.single.html

http://www.vox.com/policy-and-politics/2015/12/11/9891664/daily-show-mass-shootings

https://theconversation.com/six-things-americans-should-know-about-mass-shootings-48934

More science:

http://www.amjmed.com/article/S0002-9343(13)00444-0/abstract
http://ajph.aphapublications.org/doi/abs/10.2105/AJPH.2013.301409?journalCode=ajph
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1447364/pdf/0921988.pdf
http://www.hsph.harvard.edu/hicrc/firearms-research/guns-and-death/
http://www.kellogg.northwestern.edu/faculty/dranove/htm/Dranove/coursepages/Mgmt%20469/guns.pdf
http://www.theatlantic.com/national/print/2011/01/the-geography-of-gun-deaths/69354/
http://edition.cnn.com/2012/07/30/opinion/frum-guns-safer/
http://www.crab.rutgers.edu/~goertzel/mythsofmurder.htm
http://islandia.law.yale.edu/ayers/ayres_donohue_article.pdf
http://islandia.law.yale.edu/ayres/Ayres_Donohue_comment.pdf
http://www.motherjones.com/politics/2003/10/double-barreled-double-standards
http://www.jhsph.edu/research/centers-and-institutes/johns-hopkins-center-for-gun-policy-and-research/publications/WhitePaper020514_CaseforGunPolicyReforms.pdf

Is GM corn toxic?

According to Vendomois et al, 2009:

these data highlight signs of hepatorenal toxicity, possibly due to the new pesticides specific to each GM corn.

Monsanto, fomous for its Round Up lawsuit, the manufacturer of two of the studied strains of GM corn, responded, dismissing the article, particularly by criticizing the statistical methods used. Is Monsanto’s criticism valid?

Have their been additional studies done that either support or refute the claim that genetically-modified corn has toxic effects?

Answer:

The simple answer is no.

GM corn has the BT gene that allows lower use of pesticides due to increased or the RR gene that allows the use of glyphosate for weed control. Neither of these alterations have any impacts upon the production of sugars or proteins in the plant. http://www.ca.uky.edu/entomology/entfacts/ef130.asp

The problem that can arise is from the pesticides that are now used on the crops and the timing of their application. These pesticides are known to harm mammals and if the dose is high enough can cause problems. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2793308/

Generally though, because you are removing pests and weeds the plants tend to be healthier so they are less impacted by pathogens, thus better for consumption. http://www.acsh.org/factsfears/newsID.962/news_detail.asp

There is an issue with using corn as a feed supplement in animals though. Corn is not a complete food source and is generally low in protein, especially tryptophan. This means that a feed mix is required, not just straight corn meal. http://www.ag.ndsu.edu/pubs/ansci/beef/as1238w.htm

Another issue is that corn can cause Pellagra. This is due to the niacin and B12 being bound in the corn starches and not being released in normal digestion. Tryptophan is also low in corn and can cause Pellagra.

So the problems often cited with GM corn are actually just problems with corn itself. Neither are harmful, if used correctly in a balanced diet, but pesticide residues are of concern. For more see this: http://onlinelibrary.wiley.com/doi/10.1046/j.0960-7412.2002.001607.x/full

Another point that should be made is that the paper cited is from a notorious “research” group who produce shoddy science in order to further their biased agenda against GM technology. The big problem with the paper is that it uses the wrong sort of analysis and the data has already been analysed by two other papers and found to say the opposite of what this paper says. Essentially, if you do a statistical test with a 95% confidence margin, you are saying that you have one chance in twenty of being wrong because of natural variability. So if you measure 20 variables with separate tests, you are likely to have one be a false positive result. Measure 40 with separate tests, 2 false positives. This is what the research group did, set up the stats to generate lots of false positives, instead of analysing the data correctly with tests that account for this problem. It should be noted that this is a common problem/tactic with anti-GM research papers.

Additional question: The ACSH source claims Studies Indicate GM Crops Are Safer and Healthier, but last time ACSH reported their funding, they were co-funded by what are now GMO companies. Currently they are not open about their funding at all. Therefore, their independence cannot be established. Can you back up the claim by research where all funding sources are open and independent? – gerrit

Reply: Of course there is plenty of independent data. gmopundit.blogspot.com/ has an entire series devoted to the safety studies of GM crops. The highly respected journal Nature had an entire edition devoted to the topic. But that is beside the point, the underlying mechanism of the Bt is not one that works on humans (it is even sprayed on organic farms). We don’t have an alkaline stomach to activate the chemical (ditto some insects it doesn’t impact either) which means it can’t do anything. So the concerns are completely misplaced.

Global warming and mild winters

Does global warming make for milder winters? What about specifically North America?

(You often hear people extol global warming for giving us mild winters. Is there evidence of a causal link?)

Two examples claims of global warming causing mild winters in New York, and Tibet are linked in the comments. However, my question is whether this is a global phenomenon.

Answer:

This is a tricky question to answer because weather, what you experience at your house right now, is not really that same thing as climate, the patterns of global air and sea movements that bring weather.

So milder winters can be a possibility in certain locations, as they will be exposed to an overall warming of the entire atmosphere. But colder winters can be experienced.

Since the mid 1970s, global temperatures have been warming at around 0.2 degrees Celsius per decade. However, weather imposes its own dramatic ups and downs over the long term trend. We expect to see record cold temperatures even during global warming. Nevertheless over the last decade, daily record high temperatures occurred twice as often as record lows. This tendency towards hotter days is expected to increase as global warming continues into the 21st Century.

Vladimir Petoukhov, a climate scientist at the Potsdam Institute for Climate Impact Research, has recently completed a study on the effect of climate change on winter. According to Petoukhov,

These anomalies could triple the probability of cold winter extremes in Europe and northern Asia. Recent severe winters like last year’s or the one of 2005-06 do not conflict with the global warming picture, but rather supplement it.

Weather being a local response to climatic conditions means that you have to understand what has changed in the climatic patterns in your region. What are your local weather drivers? How have they changed since the 1970s?

Thus, you could end up with some areas experiencing colder winters; due to greater moisture levels in the air, more precipitation of snow, greater heat loss at night due to clear skies, etc. Or you could have an area that will experience milder temps in winter due to warmer air currents, warmer oceans, localised heat island impacts, etc.

For further information you should investigate the weather and climate agencies publications for your area.

Did Australia ban small-breasts pornography?

There is a widely spread news about Australia banning pornography featuring actresses with A-cup breasts.

The reason behind:

Senator Joyce claimed that publications featuring small-breasted women were encouraging paedophilia.

Is that true that this legislation exists in Australia? Is such a law legally feasible?

Answer:

The short answer is no, there is no ban on small-breasted porn models. The problem is that the actual laws on what meets classification standards are open to interpretation, so there is an “in practice” reality to the claim due to how the censors categorise and interpret the classification systems in Australia.

There is no specific rule stating that small breasts are bad, but in practice many complaints are registered and material is refused classification due to models not looking “adult” enough and can thus be categorized as either child sexual abuse or offensive sexual fetishes.

Publications will be classified ‘RC’:

  • (a) if they promote or provide instruction in paedophile activity; or if they contain:
  • (b) descriptions or depictions of child sexual abuse or any other exploitative or offensive descriptions or depictions involving a person who is, or appears to be, a child under 18;
  • (c) detailed instruction in:
    • (i) matters of crime or violence,
    • (ii) the use of proscribed drugs;
  • (d) realistic depictions of bestiality; or if they contain gratuitous, exploitative or offensive descriptions or depictions of:
  • (e) violence with a very high degree of impact which are excessively frequent, emphasised or detailed;
  • (f) cruelty or real violence which are very detailed or which have a high impact;
  • (g) sexual violence;
  • (h) sexualised nudity involving minors; (i) sexual activity involving minors; or of they contain exploitative descriptions of:
  • (j) violence in a sexual context;
  • (k) sexual activity accompanied by fetishes or practices which are revolting or abhorrent;
  • (l) incest fantasies or other fantasies which are offensive or revolting or abhorrent.

As you see, this list is quite open to interpretation. Thus the review board for published materials and the complaints board for online material often do classify materials as RC, regardless of their legality.

It is illegal to sell RC material in, say, a newsagent. It’s also illegal to make it available for viewing publicly.

But it’s not by any means illegal for me to own or possess these things myself and view them in the comfort of my own lounge room. It’s quite legal, for example, for me to own and view (or read, or listen to):

  • An RC film, TV program or other video such as Ken Park or Baise Moi;
  • Material on euthanasia such as The Peaceful Pill Handbook;
  • Material that instructs on bomb-making, theft or any other crime.

Now, sure, some of these things are distasteful to many people. Even offensive. Or morally problematic. And they are all refused classification.

But they are not illegal.

So the RC classification often has material on its list despite that material being perfectly legal. This list includes moviesbooksvideo games and internet sites.

But how do small breasted models fall under this classification system? Well, in practice, many RC classifications have been passed against many magazines, such as the Hustler Barely Legal seriesJust 18 magazine, New Climax, and of course, various DVDs like this and this. The TV show Hungry Beast did several segments on censorship of porn in Australia, including covering the issue of small breasts and exposed labia lips, which was leading to photoshopping of models.

The best example of the bias against small breasts is from the leaked Australian Internet Filter Blacklist compiled by ACMA. This list of sites was not only a disgrace, as legitimate sites were being blacklisted and didn’t realise, but many of the supposed “illegal” or RC sites were perfectly legal. The problem was that they sometimes featured small breasted women. For example, Abby Winters, Just Teen, Teens Naked and Tube8, all legal, all acceptable, all models over 18, are on the blacklist. The common theme to many of the banned porn sites is that there are small breasted women or women who “appear to be” too young. The distinction of “too young” is obviously ambiguous and thus many models are RC’d because small breasts is a sign of “young” women.

It is also worth reading the list to see the sort of sites that were being RC’d, because you will see many perfectly legal sites on the list. I suspect, as is outlined in the Wikileaks article, that complaints are lodged for any hardcore sex sites that a complainant comes across “by accident” and it is duly listed regardless of whether content ticks the points I outlined above.

Cardio vs. weight lifting for weight loss

There are a lot of people who either claim that cardio or weight lifting is the key to losing weight. For example an article questioning the need for cardio or an article claiming that cardio is the key to weight loss.

The cardio folks usually point out the “afterburner” effect, where the body continues to burn calories even after the workout. And weight lifting people mention that muscles burn more calories than fat, so more muscle is the key.

Are there studies showing if either one is true? Or are both needed? And what about interval training?

Answer:

This is a tough question to answer as there are a lot of ifs and buts.

Weight loss is all about caloric deficit, expend more energy than you consume and you lose weight. Most people do this by dieting, but the body tends to readjust the resting metabolic rate so that you don’t lose too much reserves. Thus exercise plus diet is needed for weight loss to be effective.

How effective is ‘Diet Only’ versus ‘Diet plus Exercise’ for Weight Loss? Most studies demonstrate that when diet (caloric restriction) and physical activity are combined in a weight management program, encouraging results in weight loss occur. Donnelly and colleagues (2009) explain that a weight loss program design may create an energy deficit (e.g., 500 to 1500) composed of exercise (e.g., 250 kilocalories/day) and caloric restriction (e.g., 250 kilocalories/day) for the daily caloric deficit total (500 kilocalories in this example). In studies where investigators introduce an energy deficit of 700 to 1000 kilocalories per day, ‘diet only’ and ‘diet plus exercise’ result in similar losses. Donnelly explains that this is due to metabolic adaptations that “diminish any additive effect of energy expenditure from physical activity on weight loss”. However, in investigations where the energy deficit is 500-700 kilocalories/day, the ‘diet plus exercise’ group is about 20% greater than the ‘diet only’ intervention.

So weight loss needs to be related to your activity and diet in order to understand your basal metabolism. But weight loss isn’t just about bodyweight as it is about losing bodyfat (as muscle is useful for maintaining basal metabolism and body function). When you calculate this you are able to figure out how many calories need to be removed from the diet in order to lose fat. See here. There are also strategies that can change your metabolism.

Exercise is usually broken down into two categories: cardio and weight training. There are many benefits to both and generally both are recommended for long term health. Weight training is known to burn fat.

This study is the first to directly show that resistance exercise increases adipose tissue lipolysis and thus contributes to improved body composition. This boost in lipolysis is apparently due to the excitatory effect of resistance training on specific hormones (e.g., epinephrine, norepinephrine and growth hormone). As this study design was completed with trained male subjects, it is hoped that the methods and procedures will be completed with other subject populations (e.g., females, untrained persons, youth, seniors, overweight, etc.) in future research.

For cardio training, there is obviously fat burning taking place. The amount of fat burning that occurs is related to the intensity of the cardio.

In summary, that data clearly show that exercise intensity is the main factor in determining the magnitude and duration of EPOC following aerobic exercise. Thus, when developing a cardiorespiratory exercise prescription for weight maintenance and weight loss, the influence of exercise intensity on EPOC and its potential contribution to total caloric expenditure should be taken into consideration.

The same is true of weightlifting (from the same article):

The data on resistance training and EPOC suggest that EPOC is distinctly influenced by the intensity of the resistance training program.

The actual amount of post activity “fat burning” will be related to the intensity and duration of the exercise done. Weightlifting has advantages in terms of encouraging muscle satellite cell accumulation that sustains and grows muscle. Cardio has the benefit that it can be performed for longer durations than weightlifting. So the essential answer will come down to the individual and their strength and fitness.

Essentially any exercise program should incorporate both cardio and weight training for weight loss, especially targeting fat loss.

For more articles on fitness and metabolism see here.

Further question: Hey, do you think I can get the source on your statement that “the body tends to readjust the resting metabolic rate so that you don’t lose too much reserves.”? I’m rather curious about this. – Joel Cornett

Reply: Joel, there is a lot of research related to metabolic rate and how it changes under dieting and exercise regimes. It is quite a complex topic because it depends upon many factors. Someone who has just started dieting will be different from someone who is active already in terms of responses. Here is one paper that looks at the overweight people and weight control. I linked to Kravitz’s other articles that cover some of the athlete side of metabolism in the last link.

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