A comparison of assessment methods for depression in mental retardation.

Investigated the association between various depression assessment methods in 38 adults with mild or moderate mental retardation, half of whom had relatively high and the other half had relatively low depression screening scores. Measures included a standard psychiatric interview (Diagnostic Interview for Children and Adolescents), an informant rating scale (Reiss Screen for Maladaptive Behavior), and a self-report measure (Self-Report Depression Questionnaire). Association between measures was generally low, yielding discordant classification results. Potential reasons for these discrepancies were offered, and implications for clinical and research assessment of mood disorders in mental retardation were discussed.