Abstract
Eight rats were trained on a variable-interval schedule in the presence of a light (Phase I). Responding was then extinguished in the presence of darkness that alternated with the light (Phase II). Reinforcement was then introduced in the presence of darkness (Phase III). Several rats were then returned to the condition of Phase II (Phase IV) and then to that of Phase III (Phase V). The responding of most rats showed clear behavioral contrast in Phase II—i.e., an increase in responding in the presence of the light. When, for three rats, Phase III was introduced early after the occurrence of positive contrast, either positive induction occurred, i.e., an increase in responding in the presence of the light, or there was little change. Negative contrast did not occur. It was further shown that positive contrast dissipates over time, thus replicating a result previously obtained with pigeons and that the positive induction effect seems also to dissipate over time. The introduction of reinforcement in the presence of darkness (Phases III and V) after the dissipation of positive contrast seemed to have little consistent effect.
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Selected References
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- Bloomfield T. M. Some temporal properties of behavioral contrast. J Exp Anal Behav. 1967 Mar;10(2):159–164. doi: 10.1901/jeab.1967.10-159. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Bloomfield T. M. Two types of behavioral contrast in discrimination learning. J Exp Anal Behav. 1966 Mar;9(2):155–161. doi: 10.1901/jeab.1966.9-155. [DOI] [PMC free article] [PubMed] [Google Scholar]
- HERRICK R. M., MYERS J. L., KOROTKIN A. L. Changes in Sd and Sdelta rates during the development of an operant discrimination. J Comp Physiol Psychol. 1959 Jun;52(3):359–363. doi: 10.1037/h0044283. [DOI] [PubMed] [Google Scholar]
- Pierrel R., Sherman J. G., Blue S., Hegge F. W. Auditory discrimination: a three-variable analysis of intensity effects. J Exp Anal Behav. 1970 Jan;13(1):17–35. doi: 10.1901/jeab.1970.13-17. [DOI] [PMC free article] [PubMed] [Google Scholar]
- REYNOLDS G. S. Behavioral contrast. J Exp Anal Behav. 1961 Jan;4:57–71. doi: 10.1901/jeab.1961.4-57. [DOI] [PMC free article] [PubMed] [Google Scholar]
- REYNOLDS G. S. Some limitations on behavioral contrast and induction during successive discrimination. J Exp Anal Behav. 1963 Jan;6:131–139. doi: 10.1901/jeab.1963.6-131. [DOI] [PMC free article] [PubMed] [Google Scholar]
- SMITH M. H., Jr, HOY W. J. Rate of response during operant discrimination. J Exp Psychol. 1954 Oct;48(4):259–264. doi: 10.1037/h0056928. [DOI] [PubMed] [Google Scholar]
- TERRACE H. S. Errorless transfer of a discrimination across two continua. J Exp Anal Behav. 1963 Apr;6:223–232. doi: 10.1901/jeab.1963.6-223. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Terrace H. S. Behavioral contrast and the peak shift: effects of extended discrimination training. J Exp Anal Behav. 1966 Nov;9(6):613–617. doi: 10.1901/jeab.1966.9-613. [DOI] [PMC free article] [PubMed] [Google Scholar]
- WERTHEIM G. A. BEHAVIORAL CONTRAST DURING MULTIPLE AVOIDANCE SCHEDULES. J Exp Anal Behav. 1965 Sep;8:269–278. doi: 10.1901/jeab.1965.8-269. [DOI] [PMC free article] [PubMed] [Google Scholar]