Abstract
In the present study, six groups of 10 albino rats each were given differential conditioning training in parallel alleys differing only in brightness. The results showed a positive S+ contrast effect when 20-sec delay of reinforcement or lowered drive (12-h deprivation) were used to lower responding, but a negative S+ contrast effect when subjects received both immediate reinforcement and 23-h deprivation. No present theory can adequately explain both effects.
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This paper is sponsored by James McHose, who takes full editorial responsibility for its contents. The authors wish to express thanks to Chris Mundy for typing the manuscript and to Irving Calef, the first author’s father, for constructing the apparatus.
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Calef, R.S., Calef, R.A.B., Maxwell, F.R. et al. Positive discrimination contrast with delay of reward or low drive. Bull. Psychon. Soc. 6, 120–122 (1975). https://doi.org/10.3758/BF03333165
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DOI: https://doi.org/10.3758/BF03333165
Keywords
- Contrast Effect
- Large Reward
- Positive Contrast
- Differential Conditioning
- Deprivation Schedule