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    The Development of Hyperactive–Impulsive Behaviors During the Preschool Years: The Predictive Validity of Parental Assessments

    The objectives of this study were to establish the different developmental trajectories of hyperactive–impulsive behaviors on the basis of both mother and father ratings at 19, 32, 50, and 63 months, and to ex...

    Nancy Leblanc, Michel Boivin, Ginette Dionne… in Journal of Abnormal Child Psychology (2008)