Table 2.

Working memory performance by group

	Baseline		Final
Condition	Blueberry	Placebo	Blueberry	Placebo
Acc, 0-back	0.98 (0.01)	0.94 (0.05)	0.99 (0.01)	0.96 (0.03)
Acc, 1-back	0.74 (0.15)	0.85 (0.17)	0.88 (0.11)	0.86 (0.09)
Acc, 2-back	0.72 (0.11)	0.78 (0.17)	0.79 (0.08)	0.79 (0.09)
RT, 0-back	663 (135)	592 (81)	657 (131)	623 (77)
*RT, 1-back	921 (181)	740 (142)	902 (183)	788 (130)
RT, 2-back	1037 (272)	860 (149)	1019 (272)	916 (247)

Note. Marginal means at baseline and final visits. Acc = accuracy, percent. RT = response time, ms.

^* indicates statistical difference at baseline, p = 0.04.