Preferences for and against stimuli paired with food

Article Abstract:

A study was conducted to determine whether the use of a strategy that separated the effects of conditioned and primary reinforcers which include terminal-link presentations that do not end with food can be observed in a within-subject comparison. Findings indicated that whenever there is a sudden increase in the number of terminal-link stimuli, subject learn that there is no increase in primary reinforcement. The subjects have difficulty in discriminating between two terminal links when the same terminal-link stimulus leads to a low probability of primary reinforcement for one alternative but a higher probability for another.

Animal behavior, Stimulus intensity

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Conditioned reinforcement and choice with delayed and uncertain primary reinforcers

Article Abstract:

Analysis of the study conducted on Four White Carneau pigeons that were maintained at around 80% of their free-feeding weights reveals that with the occurrence of green houselights under both reinforcement and nonreinforcement trials, preference for the green key lessened. The red and green houselights functioned as conditioned reinforces. Preference for the green key rose when 50% of the trials had 10-s green houselights followed by food and the rest of had no green houselights followed by no food.

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Contiguity and conditioned reinforcement in probabilistic choice

Article Abstract:

Probabilistic reinforcement studies show that conditioned reinforcement affects suboptimal choice and that the response from 50% reinforcement alternative is greater than the response from 100% reinforcement alternative. Experiments using pigeons have established that a conditioned punisher response is not identified after blackout. Delays following terminal-link stimuli at 100% and 50% alternatives are observed.

Conditioned response, Conditioned responses

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