References
- Guthrie , E. R. and Horton , G. P. 1937 . A study of the cat in the puzzle box . Psychol. Bull. , 34 : 774
- Hanfmann , E. and Kasanin , J. 1942 . Conceptual thinking in schizophrenia . Nerv. & Ment. Dis. Monog. , : 115 No. 67
- Köhler , W. 1927 . The Mentality of Apes , 336 New York : Harcourt Brace .
- Krechevsky , I. 1932 . Hypotheses in rats . Psychol. Rev. , 39 : 516 – 532 .
- Long , L. and Welch , L. 1941 . Reasoning ability in young children . J. of Psychol. , 12 : 21 – 44 .
- Long , L. and Welch , L. 1942 . Influence of levels of abstractness on reasoning ability . J. of Psychol. , 13 : 41 – 59 .
- Maier , N. R. F. 1930 . Reasoning in humans: I. On direction . J. Comp. Psychol. , 10 : 115 – 143 .
- Thompson , J. 1941 . The ability of children of different grade levels to generalize on sorting tests . J. of Psychol. , 11 : 119 – 126 .
- Thorndike , E. L. 1911 . Animal Intelligence: Experimental Studies , 297 New York : Macmillan .
- Watson , J. B. 1930 . Behaviorism , 308 New York : Norton .
- Witkin , H. A. 1940 . Hypotheses in rats: An experimental critique: I. the genesis of systematic behavior in linear situations . J. Comp. Psychol. , 30 : 457 – 482 . II. the displacement of responses and behavior variability in linear situations. J. Comp. Psychol., 1941, 31, 303–336