The House-Tree-Person Test is a projective test (test intended to measure personality aspects) that is used in conjunction with other standardized tests (e.g., Wechsler, Rorschach, Bender, TAT) to understand and evaluate aspects of a person's personality.
When taking this test the person is instructed to draw a picture of house, a tree and person. Then they are asked to describe the pictures drawn. The assumption is made that the person's explanation will reflect their current reality, or experiences from their past. The administrator of the test then uses tools and criteria to evaluate the results to create a synthesis or "picture" of the person's cognitive, emotional, intrapersonal and extrapersonal functioning.