evidence: There were no significant differences at baseline between groups for IQ (Ravens: WBB group, M = 26.78, SD = 4.31; Placebo group, M = 26.55, SD = 5. 98; F(1,47) = 0.024, p = 0.878)
intervention: flavonoid-rich blueberry drink
comparator: matched placebo
outcome: reduction in negative affect (NA) 2 h after consuming