The papers consist of manuscripts, research and laboratory notes, and class outlines by Clark Hull on behaviorism, hypnosis, childhood, reasoning and other topics in psychology. Of special interest are a series of twenty-eight notebooks (1915-1951) containing "original ideas on things in general." Also included are papers and theses by his students (1921-1940). Among the personal papers are two diaries (1902 and 1929, respectively) and a day-by-day record of his daughter's first two years, 1916-1917.
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