Table 2.

Means, and standard deviations for the task switching in Study 1.

Variable	ADHD (n = 20)	Control (n = 20)
	M (SD)	M (SD)
Global switch RT (ms)
Pure trials	885.91 ± 139.13	691.42 ± 179.17
Mixed trials	1290.34 ± 247.89	1113.01 ± 248.23
Global switch cost	404.43 ± 261.15	421.59 ± 169.60
Local switch RT (ms)
Non-switch trials	1255.39 ± 229.84	1066.36 ± 244.93
Switch trials	1324.98 ± 271.58	1163.96 ± 255.56
Local switch cost	69.59 ± 95.74	97.60 ± 74.76
Global switch accuracy (%)
Pure trials	85.63 ± 10.05	92.14 ± 7.09
Mixed trials	69.67 ± 14.57	86.59 ± 10.65
Global switch cost	15.96 ± 11.11	5.56 ± 6.10
Local switch accuracy (%)
Non-switch trials	70.24 ± 13.65	86.88 ± 10.72
Switch trials	69.12 ± 16.39	86.29 ± 11.56
Local switch cost	1.12 ± 7.76	0.59 ± 6.34