question: Compared to matched placebo what was the result of flavonoid-rich blueberry drink on reduction in negative affect (NA)?
context: 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)