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. 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.