Thematic Apperception Test (TAT) is a psychological assessment tool used to evaluate a person's underlying motives, concerns, and the way they perceive social situations. It involves showing individuals a series of ambiguous images, typically depicting people in various scenarios, and asking them to create a story about what is happening in each picture. The responses are analyzed to gain insights into the individual's personality and emotional functioning. Developed by Henry A. Murray and Christiana D. Morgan in the 1930s, the TAT is based on the idea that people project their own experiences and feelings onto the images. This projective technique helps psychologists understand the themes and patterns in a person's thoughts, which can be useful in clinical settings, therapy, and research.