Ginette Dionne, Sara Mascheretti, Bei Feng, Hélène Paradis, Mara Brendgen, Frank Vitaro, Richard Tremblay, Michel Boivin
To determine the validity of parent reports (PRs) of ADHD in preschoolers, we assessed hyperactivity/impulsivity (HI) and inattention (IN) in 1114 twins with PRs at 1.5, 2.5, 4, 5, 14, 15, and 17 years, and teacher-reports at 6, 7, 9, 10, and 12. We examined if preschool PRs (1) predict high HI/IN trajectories, and (2) capture genetic contributions to HI/IN into adolescence. Group-based trajectory analyses identified three 6-17 years trajectories for both HI and IN, including small groups with high HI ( N = 88, 10...
March 5, 2024: Development and Psychopathology