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.