Validation studies of the group development questionnaire

This article describes the theoretical underpinnings, construction and validation process of an instrument designed to measure developmental processes in groups. A total of 164 employees of three health care facilities comprised the validation sample. Reliability and internal consistency were assessed The process of establishing content concurrent, criterion-related and construct validity ir also reported The results support the reliability and validity of the Group Development Questionnaire. The existence of a dependable measure of group development may stimulate more basic research of group development and may encourage the creation of more research tools in this important area of study.