The purpose of this study was to introduce a motivational property of the group, friendship group engagement vs. disaffection, and to examine different composition models for combining individual reports into an indicator of a group-level property. Data were collected from 312 ninth grade students and their teachers. Self-reported friendship group…

It is widely accepted that conflict-related goals, skills, and strategies are linked. Yet it is rarely explored how these factors relate to each other and how they jointly promote or inhibit aggressive behaviors. The aim of this study is to provide answers to these questions. Data were derived from a structured questionnaire administered to 660…