References
- Goldstein , K. and Scheerer , M. 1941 . Abstract and concrete behavior . Psychol. Monog , 53 : 1 – 151 .
- Korzybski , A. 1933 . Science and Sanity , New York : Science Press .
- Woodworth , R. S. and Wells , F. L. 1911 . Association tests . Psychol. Monog , 33 : 1 – 85 .