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Sterba, Sonya K.; Copeland, William; Egger, Helen L.; Costello, E. Jane; Erkanli, Alaattin; Angold, Adrian – Journal of Child Psychology and Psychiatry, 2010
Background: The differentiation hypothesis posits that the underlying liability distribution for psychopathology is of low dimensionality in young children, inflating diagnostic comorbidity rates, but increases in dimensionality with age as latent syndromes become less correlated. This hypothesis has not been adequately tested with longitudinal…
Descriptors: Attention Deficit Hyperactivity Disorder, Psychopathology, Depression (Psychology), Separation Anxiety