fat = stupid?

October 15, 2006 at 8:05 pm | sam | crazy figure contest, literature

OK, this one wins the worst-figure contest:

fat_stupid.jpg

The authors of this paper (Cournot, M. et al.Relation between body mass index and cognitive function in healthy middle-aged men and women. Neurology 2006, 67, 1208–1214. or read the PDF: cournot_fat_stupid_neuro_2006.pdf) try to argue that there is a negative correlation between body-mass index (BMI) and cognative function (i.e. fat people are stupid). They report the correlations (such as -0.008 +/- 0.13) that are the equivalent of saying, “There are 3 people in this room … plus or minus 300.”

I swear to god, this is a quote from the paper describing that figure (this is not taken out of context, read it for yourself):

This cross-sectional association between BMI at baseline and cognitive scores persisted after adjustment for age, sex, educational level, physical activity, and region of residence and had a linear shape (figure).

Linear shape?!? Looks more like a big fat (pun intended) blob to me. Isn’t that awesome? The funniest part is that they worked so hard to adjust for all these different parameters, and still got a complete scatter. The authors must be fat, ’cause they’re pretty stupid. I can’t believe this stuff can get published! This is why people are starting to claim that most published research findings are false.

Too bad I already made the mugs for the Chemical Physics Journal Club this year, because that plot would have been perfect!

[I have to thank Spectroscope for bringing my attention to this travesty. I also have to thank Retrospectacle for reminding me why the softer sciences have a bad reputation; but my housemate thinks Shelley's hot, so I won't be too mean.]

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19 Comments »

Comment by sam
2006-10-15 20:06:22

BTW, this is further proof that the French hate fat people.

 
Comment by kendall
2006-10-16 09:43:35

Obviously the data is linear. The authors have just chosen, for interest of academic integrity, to leave in all the outliers. When subtracted, I’m sure the remaining 5% of points will be perfectly linear.

On a side note, imagine if you submitted a noise spectrum to Science and argued that at a 100% RSD level there is some magical signal. And stick to your guns, arguing vehemently that the signal is real.

 
Comment by charles
2006-10-17 15:21:45

I don’t know, looks good to me. Then again, at least one of my labmates has called me a bad chemist…

 
Comment by Altay
2006-10-30 16:26:20

Can’t stop laughing about -0.008 +/- 0.13.

I think Shelley’s parrot is hot.

 
Comment by nick
2006-11-11 13:00:17

linear fit is tragic, but at least they should be able to do proper scaling for x and y axis. They’re off…

 
2006-11-30 05:47:54

[...] at Everyday Scientist i came across a nice post Apparently the athors clame to see a nice linear correlation in this perfect circle, with an error only 100 times greater as the measured effect … seems acceptable?! (according to the reviewers) [...]

 
Comment by david
2007-03-07 20:09:03

This paper made it into Runners World as evidence that people should run more so that they will be smarter. Now I don’t know whether I can trust anything that magazine tells me.

 
Pingback by Quantum mechanic
2007-05-19 13:14:39

away in a physical chemistry lab at Stanford. Here are a few humorous posts from his “best” post list: Laboratory “motivation” posters Worst figure ever (good? science): How to tell if your rabbit is dead Worst figure ever (definitely bad science): correlation between fatness and stupidity how to become a pretentious chemistry grad student

 
Comment by Tristan MacAvery
2007-11-09 09:40:33

For what it’s worth, I am 6′1″, about 370lbs, which — according to some anorexic actuary — puts me at as much as 150 lbs overweight. I’m fat. I also have an IQ that’s been variously tested to be about 126 (from a college psych intern) to as high as 151 (from and online test); I favor the split at about 134-137 (from a licensed psychometric specialist).

Egad… would losing all that weight make me smarter than Goethe (estimated IQ at over 200)?

Comment by jerk.
2010-01-23 10:22:57

Yes. Yes it would. Shut your mouth you fat pig. Lose some weight and eat a carrot. You are obviously not that smart if you are fat. Fat = Dumb. Its scientifically proven.

 
 
Comment by sam
2007-11-10 18:06:12

if they had included you in the study instead of that one fat dumb person, i bet the trend would have gone the other way! :)

 
Comment by Mark Spencer
2007-12-25 20:43:17

This is BS. Being Fat does not equal being stupid.

There may be some correlation, but that is probably more due to socioeconomic factors than anything.

Comment by sam
2008-06-20 08:00:31

um, read the post. i am very critical of the conclusion that there is any correlation!

 
 
2008-05-27 15:43:24

[...] I read of another great correlation recently that said that fat people are stupid (I can’t make stuff like this up – look here).  [...]

 
Comment by Josh
2008-06-19 20:00:01

I will admit that I am overweight with a BMI of 28, if “Fat=Dumb”, then why did I earn straight As in school.

Comment by sam
2008-06-20 08:01:21

again, read the post not just the title. is that how you got straight As in school?

 
 
Comment by John Roberts
2009-03-15 13:49:14

This study (I actually read the mind-numbingly boring thing) fails to take into account the social factors involved, to wit, negative stereotypes commonly associated with fat people. That is to say, fat people are generally portrayed in popular media as being stupid (which is probably where the authors got the idea for this paper from). It’s a well-documented psychological phenomenon that if you work to make people feel bad about themselves (e.g. You’re stupid! You’re lazy!), they will eventually indeed begin to believe it. Thus I submit that any results that fall in line with the authors expectations are due entirely to negative stereotypes being socially imposed and enforced on the test subjects. So there, too.

 
Comment by JH
2009-08-31 06:33:38

Nice linear correlation…

But seriously, fat people are trash. It’s a proven fact that people think better when they eat healthy and exercise regularly- in other words when they keeps themselves thinner. People who are fat for reasons other than serious endocrine and other health problems are fools in that they’re consciously choosing to live for less time, feel worse, and perform less well. And why? Because they really like potato chips and big macs?

 
Comment by ab
2009-12-02 08:43:00

hey man i got a bmi of 44.. im 326 lbs.. im only 22 i have a chest flutter and im probably gunna die soon form it..but the best part is.. that fuckbags like this one^^ dont realise that some of us are active..i play football and i workout at the gym.. i do an hour of cardio in the morning and i have practise right after school.. hey jh… i bet your a fuckin crackhead.. your a joke…its called having an addiction. and yes food is probably just as big as tobacco or alcohol. jh is trash..i bet he feels good when he smashes needles.how many stds you got freak?

 
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