Literature is the verbal or written expression of events, emotions, thoughts, and dreams. Psychology is a discipline that significantly influences literature and, in turn, is heavily impacted by it. Literature draws its source from human life and, using words as its fundamental material, narrates the human experience in written or oral form. Psychology, on the other hand, is a scientific discipline that has shown rapid development since the 20th century and examines human behaviors. Therefore, the common point of literature and psychology is human beings. Especially in the analysis of literary works, literature draws from psychology, while psychology also benefits from literature in defining certain syndromes. For example, it is observed that some literary works, authors, or characters in literature inspire psychology. Syndromes, defined in the dictionary as the negative impact left on a person by a situation, fall within the scope of psychology.However, it is understood that many syndromes are inspired by literature in their definitions. In this study, works and characters that inspire psychology are generally discussed, with a focus on one of these works, Peter Pan. In this regard, the study will serve as an example of interdisciplinary research.