This study examined the new self-report version of the Strengths and Difficulties Questionnaire (SDQ-S), SDQ-Kids, in primary school children regarding internal consistency, teacher-child agreement, and validity. Data from 2,655 children in Grades 1 to 3 and their teachers were analyzed. Children completed SDQ-Kids, previously piloted (n = 896),…

Introduction: This article describes the development of an Aggression and Restriction Observation Checklist (AROC) for use in residential and in-patient services for adults with intellectual disabilities (ID). The AROC was developed in collaboration between researchers and frontline staff. It assesses self-, person-, and object-directed aggressive…

A considerable body of research has examined the association between self-presentation on social networking sites and personality in adults. Yet, there is a lack of corresponding research on adolescents as well as studies on alternative measures of personality traits of the self. The current study investigates, using a cross-sectional multi-method…

The psychometric properties of a German version of the Questions About Behavioral Function Scale (QABF) (Matson & Vollmer, 1995) were examined in a sample of 522 individuals with intellectual disabilities residing in large facilities participated. The factor structure was first examined by exploratory factor analysis, yielding a…