What is likely to be an effect of a dyad when one person decides to leave?

When one person in a dyad decides to leave, the most likely effect is that the bond ends. A dyad consists of just two individuals, and the relationship between them is based on mutual interaction. The departure of one person disrupts the entire structure of that relationship since there is only one other person left. Unlike larger groups, where one person's exit can be absorbed by the presence of others, in a dyad, the sole remaining person no longer has anyone to maintain that relationship with. This underscores the fragile nature of small group dynamics, where the presence of all participants is crucial for the continuity of the bond.

In a triadic situation, the presence of a third individual could potentially stabilize relationships and create new dynamics, but in the context of a dyad, the departure fundamentally ends that specific relationship.