In a previous study,2 participants were administered a second CAPS interview 7-14 days later. Test-retest intra-class correlations (ICCs) mean ratings of each DSM-IV symptom dimension reported by caretakers were: CD = .89; ODD = .80; inattention = .89; hyperactivityimpulsivity = .88; MDD = .82; GAD = .80; SAD = .76; social phobia = .65; specific phobia = .84; agoraphobia = .77; and OCD = .73. Test-retest ICCs for youth reports were: CD = .78; MDD = .69; GAD = .65; SAD = .68; social phobia = .62; specific phobia = .83; agoraphobia = .70; and OCD = .67. Robust correlations between symptom dimensions and functional impairment indicated external validity for both versions of the CAPS.2 Although such dimensional psychopathology scores are strongly correlated with categorical diagnoses,19-21 they focus on global ratings of symptom severity rather than diagnostic criteria such as duration, clustering, and age of onset.
