are expressed quantitatively by moderate number equations and that all complex behavior or single individuals will be derived as second laws. The third was that the primary laws with the behavior (based on the condition) can also be derived as quantitative laws from the same primary equation. he and other psychologists (Neal E. Miller, John Dollard, and O.H Mower) looked into these ideas more, they sought to understand what underlined conditioned reflex and behavior while also seeking to understand Freud and others like him. This eventually led to his work that he is primarily known for, Principles of Behavior. Death He died on May 10, 1952, in New Haven, Connecticut. Research Hull's primary interest was in theories of learning and behaviors that lead to learning. This was the goal of most of his research; in the end Hull created his own learning theory sometimes referred to as drive theory or systematic behavior theory. He also showed interest in hypnosis, but this was not his top priority in his work and research life. In both his drive theory and hypnosis research, Hull made sure that his experiments were under strict control. Also, in his work he emphasized quantitative data so everything could be analyzed more precisely, and less open to interpretation than previous studies on the topics. Aptitude training Hull began working in aptitude testing after he began teaching Daniel Starch's class at the University of Wisconsin. His interest in the field was stimulated by his dissatisfaction with contemporary tests, believing them to be lacking in procedure and validity. His book on the subject, Aptitude Testing (1928), showed his work with analyzing validity and creating scale scores. He also created his own test, the Wisconsin Lathe Test. He created a computing machine to lessen the work of producing tables of test correlations. The machine interpreted data from punch cards to produce these tables. This machine would later influence his theories on behaviorism. Hull eventually became cynical regarding the future of the field, causing him to pursue other interests. Though no longer doing active research in the field, he retained an interest, debating Karl Lashley's beliefs on the heritability of intelligence. Hypnosis Hull is often credited with having begun the modern study of hypnosis. He became interested in the field while taking over a pre-medical course on psychology from Jastrow. After successfully putting a disturbed student into a trance with a gifted