Dr. Leopold Bellak, a psychiatrist, psychoanalyst and psychologist was best known for his contributions in the fields of psychological testing and abnormal psychology.
Dr. Bellak was widely known in the field for his work with the Thematic Apperception Test, known as the T.A.T., which uses a series of evocative pictures to reveal subjects' unconscious fantasies, and the development of a version of the test for children, the Children's Apperception Test, referred to as the C.A.T.
Dr. Bellak wrote about 200 scholarly articles and some 40 books, lectured widely and wrote extensively about brief and emergency psychotherapy and about adult attention deficit disorder. He was also known for his work on schizophrenia.
With a colleague, Dr. David M. Abrams, Dr. Bellak published ''The Thematic Apperception Test, the Children's Apperception Test and the Senior Apperception Technique in Clinical Use'' (Allyn & Beacon). The sixth revised edition appeared in 1996 and remains in print, as do many of his other titles. (copyright 2000, The New York Times)