Fig. 1.

Stop Reaction Time for Children With a Schizophrenic Parent (Filled Triangles, Stars, and Squares) and a Typically Developing Comparison Group (Open Circles): the Filled Square Represents a Child With a Schizophrenic Parent Who Developed Psychosis Between the First and Second Visits; Filled Stars Represent 4 Children With a Schizophrenic Parent Who Had Already Developed a Schizophrenic Spectrum Illness by Their First Visit. A regression line (thick solid line) ± 2 SEs (dotted lines) represent regression of stop reaction time onto age for the typically developing group. For the children with a schizophrenic parent, age-adjusted stop reaction times correlate between time 1 and time 2 visits, suggesting stability of impairment over time.