Final answer:
Personal fable is a cognitive distortion that occurs during adolescence, leading to a sense of invincibility and being misunderstood by others.
Step-by-step explanation:
Personal fable is a term coined by David Elkind to describe a cognitive distortion that occurs during adolescence. It refers to the belief that one's thoughts, experiences, and emotions are unique and exceptional, leading to a sense of invincibility and being misunderstood by others. This concept is part of adolescent egocentrism, where teenagers become excessively self-focused and believe that others are as concerned with their thoughts and actions as they are.