What is characterized by the repetitive performance of a particular act?

The concept that aligns with the repetitive performance of a particular act best fits the definition of compulsion. In psychology and behavioral terms, a compulsion is a behavior that a person feels driven to perform, often in response to obsessive thoughts or anxiety. This repetitive action is usually done to alleviate distress or prevent a feared event, even if the individual may recognize that the behavior is irrational or excessive.

Understanding this term is crucial, especially in settings where mental health and patient care intersect, as recognizing compulsive behaviors can guide appropriate responses and interventions.