Fig. 1From: Test–retest reliability and convergent validity of the test of nonverbal intelligence-fourth edition in patients with schizophreniaBland–Altman plot showing the difference scores against the mean scores of pair of scores on the TONI-4. Note. The solid line shows the mean of the differences (− 0.5). The two dashed lines represent 95% limits of agreement (d ± 1.96 × SD = −14.6–13.6)Back to article page