References
- Hilgard , E. R. and Marquis , D. G. 1940 . “ Chap. 5 ” . In Conditioning and Learning , 107 New York : Do Appleton Century .
- Hull , C. L. 1943 . “ Chap, 16 ” . In Principles of Behaviour , 299 New York : D. Appleton Century .
- Macpherson , S. J. , Dees , V. and Grindley , G. C. 1948 . The Effect of Knowledge of Results on Learning and Performance. II. Some Characteristics of Very Simple Skills . Quart. J. Exp. Psychol , 1 : 68
- Woodworth , R. S. 1938 . “ Chap. 9 ” . In Experimental Psychology , 211 New York : Henry Holt .