A major group dynamic is group development, which is usually expressed in terms of:

• A. The number of hours of group conflict.
• B. Theories of group stages.
• C. The Rosenthal effect.
• D. The Hawthorne effect.

Answer: (B)

Group development is understood as a progression through stages that describe how a group forms, evolves, and eventually completes its tasks. The best way to express this dynamic is through theories of group stages because they provide a structured framework for anticipating what members will experience—such as initial orientation, conflicts that test roles, the establishment of norms, and eventual high-level performance and closure. Models like forming, storming, norming, performing, and adjourning illustrate how communication, cohesion, and leadership shift as the group moves through its life cycle, guiding how a facilitator should intervene at each point.

The other ideas don’t capture development over time in a group. The number of hours of conflict is not a standard framework for describing how groups develop, since conflict can fluctuate and isn’t a universal arrow of progression. The Rosenthal effect refers to expectations influencing research outcomes, and the Hawthorne effect refers to changes in behavior when people know they are being observed; neither is about how groups evolve through stages.