Psychometric properties of the parent strengths and difficulties questionnaire in the general population of German children and adolescents: results of the BELLA study

Abstract
The strengths and difficulties questionnaire (SDQ) is a brief screening instrument that addresses negative and positive behavioural attributes of children and adolescents in the age range of 4–16 years and can be completed by parents, teachers, and as a self-report. Furthermore, the impact supplement of the extended SDQ surveys for perceived problems, impact, and burden.

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