CNN reports that the Princeton, N.J. SAT test-prep company, Peterson, is going to expand it's services passed just academics, to include;

the choice of pre-exam meal, the hue of their clothes, the music they hear on the drive to the test.

It is not going to do it through actual experimentation and observation, but through hiring specialized consultants;

Some of the research is already under way. A nutritionist has developed guidelines for a long-term diet heavy on vitamin B6, plus folate, to help build red blood cells that carry oxygen to the brain and vitamin C to help the body cope with stress. A pasta dinner the night before is suggested, as is avoiding candy and caffeine...Tunsky, famous in the fashion world for helping clients figure out the next hot color, on a wardrobe project. A fitness expert will demonstrate stretches and exercises at a guidance counselors convention this fall, and a mobile laboratory will visit high schools to advise students on what scents, colors and sounds might work best for them.

And to those that this is just a silly industry trying to expand their services so they can justify a higher price (ergo a higher profit), check this out;

Franklin Chang, a guidance counselor at Lane Technical College Prep High School in Chicago, said that, for better or worse, students do worry about these things.

"I personally think it doesn't have much impact whether you stop eating chocolate or wear white, but students when it comes to high-stakes testing do want to cover all the bases," he said

Interesting how desperate some students are becoming in trying to squeeze out the last 10-20 points out of the test.