To study the effects of various chocolate types on brain power, Raudenbush and colleagues had a group of volunteers consume, on four separate occasions, 85 grams of milk chocolate; 85 grams of dark chocolate; 85 grams of carob; and nothing (the control condition).
After a 15-minute digestive period, participants completed a variety of computer-based neuropsychological tests designed to assess cognitive performance including memory, attention span, reaction time, and problem solving.
"Composite scores for verbal and visual memory were significantly higher for milk chocolate than the other conditions," Raudenbush told Reuters Health. And consumption of milk and dark chocolate was associated with improved impulse control and reaction time.
[Reuters Health, 24 May 2006]
Come June when classes will open here once more, it looks like students will now know what to do 15 minutes before they take any test or exams. Not recommended for prediabetics and diabetics, though.