A Cochrane review [Abstract] 1 included 11 studies with 943 subjects. The interventions included written information and videotapes. In general, media-based therapies for behavioural disorders in children had a moderate, if variable, effect when compared with both no-treatment controls with effects sizes ranging from -0.12 (-1.65, 1.41) to -32.60 (-49.93, -15.27) and as and adjunct to medication with effect sizes ranging from -2.71 (-5.86, -0.44) to -39.55 (-75.01, -4.09). Significant improvements were made with the addition of up to two hours of therapist time.
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