THE TRAIT AND METHOD COMPONENTS OF RATINGS OF CONDUCT DISORDER—PART I. MATERNAL AND TEACHER EVALUATIONS OF CONDUCT DISORDER IN YOUNG CHILDREN
Corresponding Author
D. M. Fergusson
The Christchurch Child Development Study, Christchurch Clinical School of Medicine, Christchurch Public Hospital, Christchurch, New Zealand.
Requests for reprints to: Mr. D. M. Fergusson, The Christchurch Child Development Study, Department of Paediatrics, Christchurch Clinical School of Medicine, Christchurch Public Hospital, Christchurch, New Zealand.Search for more papers by this authorL. J. Horwood
The Christchurch Child Development Study, Christchurch Clinical School of Medicine, Christchurch Public Hospital, Christchurch, New Zealand.
Search for more papers by this authorCorresponding Author
D. M. Fergusson
The Christchurch Child Development Study, Christchurch Clinical School of Medicine, Christchurch Public Hospital, Christchurch, New Zealand.
Requests for reprints to: Mr. D. M. Fergusson, The Christchurch Child Development Study, Department of Paediatrics, Christchurch Clinical School of Medicine, Christchurch Public Hospital, Christchurch, New Zealand.Search for more papers by this authorL. J. Horwood
The Christchurch Child Development Study, Christchurch Clinical School of Medicine, Christchurch Public Hospital, Christchurch, New Zealand.
Search for more papers by this authorAbstract
Abstract A theoretical model designed to estimate the trait and method specific components of maternal and teacher ratings of childhood conduct disorder is presented. The model was applied to data collected on a birth cohort of New Zealand children. The model produced evidence to indicate that maternal and leather ratings of childhood behaviour were contaminated by method variance. It was estimated that one-third of the variance in these scores reflected variance attributable to child behaviour rates When the data were adjusted for the effects of method specific factors, the model suggested that conduct disorder measures were highly stable over time.
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