. Author manuscript; available in PMC: 2019 Mar 1.

Published in final edited form as: J Am Acad Child Adolesc Psychiatry. 2017 Dec 28;57(3):166–174. doi: 10.1016/j.jaac.2017.12.009

Table 2.

N-Back Task Performance

N-back	Accuracy % mean ± SD (n)			Cohen's d, P

	COS	SIB	C	COS vs. C	SIB vs.C
1-back	64.2 ± 30.0 (30)	87.0 ± 23.8 (30)	89.2 ± 21.5 (39)	1.0, <0.001	0.1, 0.945
2-back	56.8 ± 23.0 (12)	74.7 ± 24.4 (29)	84.9 ± 19.6 (39)	1.3, <0.001	0.5, 0.161

Note. Only patients who completed scanning were included in analyses. Groups were compared using Welch two-sample t tests, and effects were measured by Cohen’s d. BOLD = blood oxygen level-dependent; C = controls; COS = childhood-onset schizophrenia; SIB = siblings.