Michael T. Willoughby|Zane E. Blanton|Family Life Project Investigators
Replication and External Validation of a Bi-Factor Parameterization of Attention Deficit/Hyperactivity Symptomatology
University of North Carolina at Chapel Hill|University of North Carolina at Chapel Hill
study evaluated fit criterion validity recently proposed bifactor structure attention deficithyperactivity disorder adhd symptoms participants 1093 children drawn ongoing prospective longitudinal study whose adhd symptoms rated parents teachers children 1st grade criterion validity bifactor model established using range schoolbased outcomes included treatment utilization teacher perceptions need treatment academic functioning peer teacher relationship quality results indicated bifactor model parameterization provided equally good fit parent teacher combined reports adhd symptoms traditional 1 2 3factor models however contrast traditional models bifactor parameterization acknowledged unity diversity adhd symptoms general adhd latent factor explained vast majority observed variation every symptom whereas general adhd latent factor significantly associated 15 outcomes specific inattentive factor explained unique variation 9 primarily academically oriented outcomes specific hyperactiveimpulsive factor explained unique variation 2 outcomes general adhd factor strongly correlated observed adhd symptom scores total inattentive hyperactiveimpulsive either specific factor results discussed respect changes conceptualization factor structure correspond recent changes diagnostic criteria adhd well whetherhow individual differences inattention hyperactivityimpulsivity might used differentiate children diagnosed adhd