All of the following are stages of group development, except:

The correct answer is derived from understanding the stages of group development as proposed by Bruce Tuckman in his model. Tuckman's original framework included four stages: forming, storming, norming, and performing. Adjourning is a later addition made to reflect the end phase of group work, where the group disbands after achieving its objectives.

Identifying the stages correctly emphasizes the dynamics a group experiences as it works towards its goals. The stages are defined as follows:

• Forming is when group members first come together and start to understand their roles.
• Storming involves conflict and competition as members begin expressing their individual personalities.
• Norming is when group cohesion develops, and members start to establish norms and work collaboratively.

Thus, while adjourning is indeed part of the group development process, it does not belong to the original four stages outlined by Tuckman. Understanding this distinction is crucial for those studying group dynamics and management within the context of disability management.