Final answer:
The general principle is that different incentives, dynamics, and challenges emerge in large groups compared to small groups.
Step-by-step explanation:
The general principle that characterizes the effects of group size is that different incentives, dynamics, and challenges emerge in large groups compared to small groups. In small groups, monitoring and enforcement are easier, individuals have stronger connections and trust, but they are also more prone to prisoner's dilemmas. On the other hand, large groups can rely more on social trust, but individuals may not necessarily trust or know each other, making it harder to monitor and enforce behavior. The larger the group, the more attention it can garner and the more pressure members can exert toward their goals, but the risk of division and lack of cohesion also increases.