This research was carried out while the authors were at the Massachusetts Institute of Technology, and was supported in part by the Air Force Office of Scientific Research under Contract AF 18 (603)-85.
GENERALIZATION GRADIENTS OF INHIBITION FOLLOWING AUDITORY DISCRIMINATION LEARNING1
Article first published online: 26 FEB 2013
1962 Society for the Experimental Analysis of Behavior
Journal of the Experimental Analysis of Behavior
Volume 5, Issue 4, pages 435–441, October 1962
How to Cite
Jenkins, H. M. and Harrison, R. H. (1962), GENERALIZATION GRADIENTS OF INHIBITION FOLLOWING AUDITORY DISCRIMINATION LEARNING. Jrnl Exper Analysis Behavior, 5: 435–441. doi: 10.1901/jeab.1962.5-435
- Issue published online: 26 FEB 2013
- Article first published online: 26 FEB 2013
- Received December 18, 1961
A more direct method than the usual ones for obtaining inhibitory gradients requires that the dimension of the nonreinforced stimulus selected for testing be orthogonal to the dimensions of the reinforced stimulus. In that case, the test points along the inhibitory gradient are equally distant from the reinforced stimulus. An attempt was made to realize this condition by obtaining inhibitory gradients along the frequency dimension of a pure tone after discrimination training in which the nonreinforced stimulus was a pure tone (or tones), and the reinforced stimulus was either white noise or the absence of a tone. The results showed that some degree of specific inhibitory control was exerted by the frequency of the tone, although the gradients were broad and shallow in slope.
A further experiment was conducted to see whether the modification of an excitatory gradient resulting from training to discriminate neighboring tones could arise from a simple interaction of inhibitory and excitatory gradients. The results indicated that it could not, since discrimination training produced a concentration of responding in the vicinity of the reinforced stimulus which cannot be derived from any plausible gradient of inhibition.