The Hand Test, a projective device developed about 15 years ago, has gained rapidly in popularity among clinical and school psychologists. A variety of reliability and validity studies have been conducted with the instrument across a broad spectrum of clients and settings, A considerable amount of developmental work has been conducted on the Hand Test since its inception. Research on this test was reviewed and discussed with the conclusion that the Hand Test has merit in many clinical applications for children, adolescents and adults. The instrument has potential in diverse assessment situations and is used today by a wide spectrum of practitioners. Research points toward the Hand Test as being a valuable quantitative multidimensional instrument which predicts behaviors.