The Thematic Apperception Test (TAT) is a projective psychological test developed in the 1930s using a series of vague picture cards. The test exposes a person's unconscious desires and needs by having them tell stories based on the pictures. It was an improvement over the Rorschach inkblot test. The test consists of 31 cards, with different sets for males/females over and under age 14. Responses are analyzed to understand characters, motives, environment influences, outcomes, and interests to draw conclusions about the test taker's personality. However, the TAT has limitations including low validity and reliability due to a lack of standardization.