The present study examined the power of measures of early preschool behavior to predict later diagnoses of attention-deficit/hyperactivity disorder (ADHD) and oppositional defiant disorder (ODD)/conduct disorder (CD). Participants were 168 children with behavior problems at age 3 who underwent a multi-method assessment of ADHD and ODD symptoms and were followed annually for 3 years. Fifty-eight percent of 3-year-old children with behavior problems met criteria for ADHD and/or ODD/CD 3 years later. Using a diagnostic interview and rating scales at age 3, later diagnostic status could be accurately predicted for three-quarters of children for ADHD and for two-thirds of children for ODD/CD. Predictive power of the best models did not increase significantly at age 4 and age 5 compared to age 3. Results provide support for the validity of early diagnoses of ADHD, though caution is needed in making diagnoses because a significant minority of children with early hyperactivity and inattention do outgrow their problems.

This study focused on gaining a better understanding of the neuropsychological abilities of preschool-aged children who show elevated levels of hyperactivity and oppositional-defiance. It examined the performance of children aged 48 to 67 months on tests of attention/executive function, language, memory, and sensorimotor abilities, as measured by the NEPSY and Conners' K-CPT. Two hundred thirty-seven children were divided into four subgroups based on mothers' report of behavior using rating scales and a diagnostic interview: hyperactive only (HYP), oppositional-defiant only (OD), hyperactive and oppositional-defiant (HYP/OD), and nonproblem. Children in the HYP/OD group scored significantly worse than nonproblem children on four of nine subtests on the NEPSY, including one test of executive function, one test of language comprehension, and both tests of short-term verbal memory. However, only the test of executive function (Statue) showed significant predictive power, and, while specificity of this subtest was good, sensitivity was poor. On the K-CPT, a continuous performance test, children in both the HYP and HYP/OD groups performed worse than children in the OD and nonproblem groups. When the NEPSY Statue subtest and the K-CPT were used together, overall predictive power was .74. Results suggest that neuropsychological deficits can be observed among preschool children with hyperactivity, particularly when comorbid oppositional-defiance is present; however, moderate predictive power suggests that these tests should be used in conjunction with other methods of assessment.

This study examines the relation between 3-year-old children's (N ϭ 280) symptoms of inattention, hyperactivity, and aggression and their cognitive, motor, and preacademic skills. When the authors controlled for other types of attention and behavior problems, maternal ratings of hyperactivity and teacher ratings of inattention were uniquely and moderately associated with children's lower cognitive and preacademic skills. The few modest, simple associations between maternal ratings of aggression and children's skills were no longer significant when hyperactivity and inattention were controlled. This suggests that cognitive and preacademic problems among children with attention-deficit/hyperactivity disorder symptoms may begin to emerge as early as age 3. The results highlight the importance of examining the association between different types of behavior problems and young children's skills.

This study examined the role of ethnicity in untrained observers' ratings of videotaped mother-child interactions. Participants were Black, White, and Latino undergraduates (N = 109), who rated videotapes of 4 Black, 4 White, and 4 Latino mother-child dyads. Overall, participants of different ethnicities showed more similarities than differences in their ratings of parent-child behavior. There was, however, evidence that participant ethnicity and parent-child ethnicity interacted for ratings of child defiance/negative emotion. Black and White participants differed in their ratings of Black and White children's defiance/negative emotion, with members of each ethnic group favoring children of their own ethnic group. Intergroup contact appeared to play a role in ratings of parent behavior among Black observers. Black observers who reported low intergroup contact tended to rate Black mothers high on strictness and low on permissiveness. More research is needed to better understand the role of ethnicity in observers' ratings of parent and child behavior.