Table 2. Behavioral data on the task switching paradigm for patients with obsessive-compulsive disorder (OCD), patients with major depressive disorder (MDD), and healthy controls.

Event type	OCD (N = 18)				MDD (N = 19)				Controls (N = 29)
	RTs (ms)		Error %		RTs (ms)		Error %		RTs (ms)		Error %
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Repeat events (REs)	1179	203	2.5	2.4	1155	300	5.6	7.0	1025	220	5.5	5.1
Switch events (SEs)	1540	247	4.1	4.1	1664	359	7.0	8.9	1474	325	9.4	11.2
Switch cost (SE-RE)	T	p	T	p	T	p	T	p	T	p	T	p
	−6.8	.0001	−2.0	.05	−11.2	.0001	−1.6	.12	−11.1	.0001	−2.5	.03