Mean performance on the stop-signal task in normal controls, ARMS subjects and schizophrenia patients; these means were examined using ANOVAs.

Note. Data are presented as the means (SD). ARMS = at-risk mental state; IIV = intra-individual variability; SSRT = stop-signal reaction time; Go RT = reaction time on go trials; PSS = proportion of successful stops. ap<0.05 for two-tailed tests. bp<0.01 adjusted significance for two-tailed tests with application of Bonferroni correction for multiple comparisons.