Abstract
Internal consistency and construct and criterion-related validity of the Conners Teacher Rating Scale—28 (CTRS-28) were studied, with particular emphasis on its utility as a measure of Attention-Deficit/Hyperactivity Disorder (AD/HD) and other disruptive behavior disorders. Subjects were teachers of 540 boys and girls ages 5-10. Internal consistency of the factors ranged from.87 to.94. Convergent validity with similar rating scales generally yielded adequate, but not strong, relationships.
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