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OBJECTIVE To test whether the latent structure of attention deficit/hyperactivity disorder (ADHD) is best understood as categorical or dimensional in samples of 1774 children (aged 6-12 years) and 1222 adolescents (aged 13-17 years) drawn from an Australian epidemiological study. METHOD Two taxometric procedures (MAXEIG and MAMBAC) examined ADHD symptom(More)
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