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.

[Read more…]

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.

[Read more…]

Another phrase that annoys

Over there on the right is a classic example of garbled science: the claim that vegetables can be grown ‘without chemicals,’ as if the vegetables themselves weren’t little lumps of chemicals already.

But I have another one to add to the list of bad ideas, and this one comes from a press release from the American Thoracic Society.

Electronic cigarette flavorings alter lung function at the cellular level.

[Read more…]