Table 3.

Group differences on behavioral measures of performance.

	ADHD Mean(SD)	CTRL Mean(SD)	p-value	Effect Size (Cohen's d)
Accuracy (%)
No Reward	66.3 (14.3)	72.0 (11.9)	.12	0.43
Reward	70.8 (13.5)	72.2 (14.3)	.73	0.10
No Reward Congruent	80.5 (17.6)	88.9 (9.6)	.04	0.56
No Reward Incongruent	52.1 (13.9)	55.2 (17.1)	.46	0.20
Reward Congruent	86.4 (14.2)	89.2 (11.7)	.63	0.22
Reward Incongruent	55.3 (15.3)	55.3 (19.8)	.99	0.01
Too Slow Response Deadline	666.0 (103.2)	602.0 (99.2)	.02	0.61
No Reward (% TS)	12.8 (9.3)	10.3 (7.0)	.27	0.30
Reward (% TS)	9.6 (7.6)	7.8 (5.7)	.33	0.26
Reaction Time (ms)
No Reward Congruent	576.6 (109.6)	504.2 (104.9)	.02	0.64
No Reward Incongruent	625.7 (112.1)	556.6 (101.7)	.02	0.62
Reward Congruent	539.4 (115.9)	471.5 (105.0)	.03	0.59
Reward Incongruent	595.5 (110.0)	533.3 (114.3)	<.05	0.54