Filtering by: Creator John W. Hoffman Remove constraint Creator: John W. Hoffman Date 1977 Remove constraint Date: 1977 Degree M.S. Remove constraint Degree: M.S. Keyword classical Remove constraint Keyword: classical Keyword conditioning Remove constraint Keyword: conditioning Keyword heart rate Remove constraint Keyword: heart rate Keyword reinforcement (psychology) Remove constraint Keyword: reinforcement (psychology) Collection Scholars Archive Remove constraint Collection: Scholars Archive