What describes exhibiting immature behavior as a result of stress or anxiety?

The term that describes exhibiting immature behavior as a response to stress or anxiety is regression. This psychological concept refers to a defense mechanism where an individual reverts to earlier stages of development, often in the face of overwhelming stress or difficulties. For instance, an adult might exhibit childlike behaviors, such as tantrums or dependence, when faced with challenging situations. Regression serves as a coping strategy, allowing individuals to retreat to a time when they felt safer and more secure.

In contrast, the other options reflect different psychological concepts. Progression generally refers to moving forward or advancing, which is not applicable in the context of immature behavior related to stress. Repression involves pushing away distressing thoughts or feelings from conscious awareness rather than exhibiting immature behavior. Depression is a mood disorder characterized by persistent sadness and a lack of interest or pleasure in activities, rather than the specific behavior of acting immaturely in response to stress. Understanding these distinctions highlights why regression is the correct answer in the context of the question.