Investigated the usefulness of parents’ concerns about a child’s behavior in the early detection of significant behavioral disturbances. 60 parents with children aged 24-60 mo of age were recruited. Parents’ concerns were elicited using the Parents’ Evaluation of Developmental Status (PEDS®), and behavioral problems were measured by the Pre-School Behavior Checklist (PBCL). Results indicate the commonality of parental concerns about behavior. PEDS® was 76% sensitive to child’s conduct problems and 70% specific in identifying children with normal behavior. Demographic and developmental status of the child did not seem to influence whether parents’ concerns about behavior were accurate or inaccurate in identifying children with significant conduct problems. Multiple regression analysis revealed that the number of parental concerns, type of family, and number of significant concerns accounted for 25% of variance in the PBCL score.