In a recent study examining how group dynamics affect decision-making, researchers set up two different scenarios where participants had to decide how to allocate resources among group members. In one scenario, participants were placed in homogeneous groups (where all members shared similar demographics and opinions), and in another scenario, they were placed in heterogeneous groups (where members varied in demographics and opinions). The researchers found significant differences in the decision-making processes and outcomes between the two types of groups.

Based on this study's findings, which of the following statements best describes the impact of group composition on decision-making processes in social psychology?