Chocolate ethics

badchocolate

I’ve been arguing with myself again. I really liked that phony chocolate study because it so effectively demonstrated a couple of problems I tell my students about, so it’s a spectacular way to illustrate p-hacking and the unreliability of peer review. But as I was thinking about it, and how to present it to a class, it started to sink in that it also raises brand new problems that make it very difficult to use as an example. And then I started reading some other articles that emphasize the ethical concerns in this study.

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The chocolate diet, or how to lie with science

woman-eating-chocolate

I have to say that I was positively thrilled by this article on how you can lose weight by eating chocolate. It encapsulates so many things I try to drill into my students — I’ll probably use it in my genetics class as an example of bad statistics, and my writing class as an example of using science writing skills for evil.

Here’s the deal: chocolate doesn’t help you lose weight. But if you confuse the data with a large number of variables that you ignore, and do a little unscrupulous p-hacking, you can get an effect with statistical significance. So these authors set out to produce a bad study in nutritional science, and see if they can get it to be publicized.

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Junk DNA: A Journey Through the Dark Matter of the Genome

junkdna

I made a dreadful mistake. Before embarking on my trip to Germany, with those long transatlantic flights, I stocked up my Kindle with a couple of books to keep me entertained. One of them was Nessa Carey’s Junk DNA: A Journey Through the Dark Matter of the Genome. It was a poor investment. I could not finish it. I got maybe a half hour worth of reading out of it before I was too exasperated to continue, and instead watched a ghastly Night at the Museum sequel being shown on the plane’s entertainment system. It was a terrible movie, but better than this book.

Actually, it didn’t take me a half hour to become peevish. The very first page after the acknowledgments, in a section called “Notes on Nomenclature,” contained this abomination.

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