Table 3.

Task performance and effect sizes by group and task condition for the Auditory Continuous Performance Test for Study 1

Task condition	Schizophrenia M (SD)	Relatives M (SD)	Normal Controls M (SD)	Schizophrenia vs Normal Control		Schizophrenia vs Relatives		Relatives vs Normal Control
				d a	d b	d a	d b	d a	d b
A correct hit %	.87 (.16)	.99 (.02)	.98 (.05)	0.87**e	1.11***	0.99**e	1.42***	0.24	0.29
QA correct hit %	.83 (.19)	.98 (.03)	.98 (.03)	1.10***e	1.51***	1.09** e	1.50***	0.03	0.03
Q3A-MEM correct hit %	.64 (.26) d	.84 (.13)	.87 (.13)	1.14***	1.39***	1.00***	1.21***	0.22	0.29
Q1A-INT correct hit %	.59 (.22) d	.81 (.15)	.87 (.13)	1.53***	1.81***	1.17***	1.28***	0.38*	0.41*
Q3A-INT correct hit %	.39 (.21)	.53 (.15)	.60 (.18)	1.13***	1.21***	0.80***	0.83**	0.43*	0.51**
A d’	3.54 (.75)	4.19 (.24)	4.17 (.24)	1.13***	1.44***	1.16***	1.52***	0.07	0.07
QA d’	3.35 (.85)	4.18 (.26)	4.24 (.23)	1.42***	1.87***	1.32***	1.74***	0.23	0.22
Q3A-MEM d’	2.75 (.91) d	3.53 (.53)	3.68 (.48)	1.27***	1.55***	1.05***	1.24***	0.29	0.35*
Q1A-INT d’	2.49 (.79) d	3.32 (.64)	3.60 (.58)	1.60***	1.78***	1.14***	1.18***	0.46**	0.50**
Q3A-INT d’	1.79 (.70)	2.48 (.47)	2.67 (.56)	1.38***	1.56***	1.16***	1.28***	0.36*	0.43*

Note. Means and standard deviations are unadjusted. d = Cohen’s d. d’ is a measure of efficiency that takes into account both hit and false alarm rate.

^*p < .05;

^**p < .01;

^***p < .001 (one tailed)

^ap-values based on planned contrasts (unadjusted)

^bp-values based on ANCOVAs controlling for age. Cohen’s d based on least squared means.

^dn = 18 due to missing data

^ep-values based on t-test with unequal variance