What is the foot-in-the-door phenomenon?

The foot-in-the-door phenomenon refers to a persuasive technique where getting a person to agree to a small request increases the likelihood they will agree to a larger request later. This phenomenon is rooted in the principle of consistency; when someone commits to a small action, they may feel compelled to act consistently with their previous commitment and thus will be more likely to comply with a subsequent, larger request. This gradual escalation helps in establishing a rapport or connection with the requester, making it easier for the individual to acquiesce to larger requests as they feel a sense of commitment has already been established.

In contrast, the other options describe different psychological concepts that do not align with the foot-in-the-door phenomenon, such as aggression stemming from frustration, biases in behavior attribution, or techniques of manipulating opinions through mere exposure without the gradual commitment aspect inherent in the foot-in-the-door technique.