Disaggregating parental depression and family stress in assessing families of children with developmental disabilities: a multisample analysis.

The psychometric properties of a 5-item subcomponent (DEP5) of Factor 1, Parent and Family Problems, of the Friedrich Questionnaire on Resources and Stress were examined to determine whether these items formed a depression subcomponent of the larger family stress factor. Data were pooled from two samples numbering more than 450 respondents. Internal analyses established that the DEP5 had adequate internal reliability and stability over 2 years. Furthermore, confirmatory factor analyses indicated that the DEP5 measured depressive reactions as distinct from other parent and family problems. These results should be useful to researchers who want to reanalyze the Questionnaire on Resources and Stress data specifically for depressive reactions. Also, the technique for disaggregating global instruments can be applied to other variables.