The relationship of Clark L. Hull's hypnosis research to his later learning theory: the continuity of his life's work.

What has been missing in previous historical accounts of Clark L. Hull is a view of his life's work as an integrated whole. This paper contributes to that end by relating his hypnosis research and theory during the years 1921 to 1933 to the developing behavioral orientation of his learning theory. In addition, this paper relates his work historically and conceptually to the theory of ideomotor actin endorsed by William James and a number of other nineteenth-century psychologists, and transmitted by Hull into the stimulus-response terminology of the 1930s.