Angold and Costello (1995) reported the two week test-retest reliability (kappa) of CAPA diagnoses ranged .56 to 1.0 in children aged 10-18. These reliabilities are comparable to those of other similar assessments such as the Diagnostic Assessment in Child and Adolescent Psychopathology (Shaffer, 1999). CAPA parent and child reports were combined at the symptom level using “or” logic except regarding hyperactivity as the CAPA does not ask children about this symptom area.
