Which researcher is credited with identifying the four stages of group/team development?

The researcher credited with identifying the four stages of group or team development is Tuckman. In 1965, Bruce Tuckman introduced a model that outlines the stages a team typically goes through as they form and begin to work together effectively. These stages are commonly referred to as forming, storming, norming, and performing.

The "forming" stage involves team members getting to know each other and establishing ground rules. The "storming" stage is where conflicts and competition among team members may arise as they begin to address issues and work styles. During the "norming" stage, the team starts to resolve their differences, appreciate each other’s strengths, and establish more cohesive working relationships. Finally, in the "performing" stage, the team functions at a high level, with members effectively collaborating towards common goals.

This model is widely used in team development and management, making Tuckman a key figure in understanding team dynamics and progress. Other researchers mentioned, such as Belbin, focus on different aspects like team roles, while Rackham and Buchanan contribute to different areas within organizational behavior and development, but it is Tuckman who is specifically associated with the stages of team development.