Which stage is NOT part of the group development process?

The correct answer is that "Isolation" is not part of the commonly recognized stages of group development. The group development process, often described by models such as Bruce Tuckman's stages, includes forming, storming, norming, performing, and adjourning. These stages capture the typical progression of a group's dynamics as they form and become more cohesive.

In this context, "Acceptance" refers to a stage where members acknowledge their roles and work together effectively, while "Disillusion" can describe a phase where members may feel disappointment as conflicts arise or as challenges become evident during the group's functioning. "Cohesion" represents a stage where group members bond and work collaboratively towards their goals.

However, "Isolation" typically does not align with these stages. It implies a breakdown of communication and connection within the group, which is contrary to the development and progression toward a successful, functioning group. Thus, acknowledging "Isolation" as an absence from the developmental stages underscores its non-constructive nature in a group's journey towards effectiveness.