What term refers to the degree to which group members think and act alike?

The term that best refers to the degree to which group members think and act alike is homogeneity. Homogeneity indicates a state where group members share similar characteristics, beliefs, or behaviors, resulting in a uniformity of thought and action. This concept highlights how a group consists of individuals who are alike in significant ways, fostering cohesion and mutual understanding among its members.

Conformity, while related, specifically describes the act of adjusting one's beliefs or behaviors to match those of the group, rather than the inherent similarity within the group itself. Solidarity emphasizes unity and shared interests among group members, but it may not specifically address the alignment of thoughts and actions as a characteristic of the group's composition. Uniformity suggests sameness in behavior or appearance but does not encompass the underlying attitudes or beliefs. Therefore, homogeneity is the term that most accurately captures the notion of group members thinking and acting alike.