Distribution of parent-report symptoms for 40-month-old preschoolers who had robust and diminished P50 sensory gating based on assessment in infancy. Parent-report preschool scores are based on the Child Behavior Checklist. A significant main effect for gender is identified for attention symptoms (F=6.27, ndf=1, ddf=46, p=.016), so attention symptoms are separated by gender. There is a significant effect of robust versus diminished infant P50 sensory gating for A) the domain of externalizing symptoms (F=4.17, ndf=1, ddf=46, p=.047), the specific subscales B) anxiety/depressed subscales (F=5.36, ndf=1, ddf=46, p=.025) and for (C and D) attention (F=5.23, ndf=1, ddf=46, p=.027). There was also a significant effect on robust versus diminished P50 sensory gating for Child Behavior Checklist DSM categories of E) anxiety (F=5.64, ndf=1, ddf=46, p=.022) and G) attention-deficit hyperactivity problems (F=5.40, ndf=1, ddf=46, p=.025), as well as a notable trend for F) oppositional defiant problems (F=3.94, ndf=1, ddf=46, p=.053). All statistical results are nonparametric, based on a rank transformation for Child Behavior Checklist results.