Abstract
Two experiments were performed to determine the effects of omitting the comparison stimuli in a matching-to-sample task. In Experiment 1, birds were trained initially on both symbolic and identity matching to sample. Comparison stimuli were then omitted following the presentation of a particular sample stimulus, and this decreased the number of sample (observing) responses. The reintroduction of the comparison stimuli on subsequent probe trials revealed that the accuracy of symbolic matching was reduced to chance levels, while identity matching accuracy was significantly below chance. In Experiment 2, a similar procedure was employed; however, observing responses to the comparison-omitted samples were maintained by direct reinforcement (fixed ratio 20). Matching accuracy during probe trials was again at chance levels for symbolic matching but, contrary to Experiment 1, was significantly above chance for identity matching. The differential effects of omitting comparison stimuli on symbolic and identity matching trials in these two experiments were interpreted within a framework which assumes that instructional processes are altered by comparison-omission procedures.
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References
Carter, D. E., &Werner, T. J. Complex learning and information processing by pigeons: A critical analysis.Journal of the Experimental Analysis of Behavior, 1978,29, 565–601.
Grant, D. S. Effect of sample presentation time on long-delay matching in the pigeon.Learning and Motivation, 1976,7, 580–590.
Honig, W. K. Studies of working memory in the pigeon. In S. H. Hulse, H. Fowler, & W. K. Honig (Eds.),Cognitive processes in animal behavior. Hillsdale, N.J: Erlbaum, 1978.
Maki, W. S., Gillund, G., Hauge, G., &Siders, W. A. Matching to sample after extinction of observing responses.Journal of Experimental Psychology: Animal Behavior Processes, 1977,3, 285–296.
Maki, W. S., Olson, D., &Rego, S. Directed forgetting in pigeons: Analysis of cue functions.Animal Learning & Behavior, 1981,9, 189–195.
Roberts, W. A. Short-term memory in the pigeon: Effects of repetition and spacing.Journal of Experimental Psychology, 1972,94, 74–83.
Roitblat, M. L. Codes and coding processes in pigeon short-term memory.Animal Learning & Behavior, 1980,8, 341–351.
Sacks, R. A., Kamil, A. C., &Mack, R. The effects of fixed-ratio sample requirements on matching to sample in the pigeon.Psychonomic Science, 1972,26, 291–293.
Staddon, J. E. R. Temporal control, attention, and memory.Psychological Review, 1974,81, 375–391.
Stubbs, D. A., Vautin, S. J., Reid, H. M., &Delehanty, D. L. Discrimination functions of schedule stimuli and memory: A combination of schedule and choice procedures.Journal of the Experimental Analysis of Behavior, 1978,29, 167–180.
Urcuioli, P. J., &Honig, W. K. Control of choice in conditional discriminations by sample-specific behaviors.Journal of Experimental Psychology: Animal Behavior Processes, 1980,6, 251–277.
Wilkie, D. M. Delayed symbolic matching to sample in the pigeon.Psychological Record, 1978,28, 463–469.
Zentall, T. R., Hogan, D. E., Howard, M. M., &Moore, B. S. Delayed matching in the pigeon: Effect on performance of sample-specific observing responses and differential delay behavior.Learning and Motivation, 1978,9, 202–218.
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This research was supported by Grant A9801 from the National Research Council of Canada to Jo Tombaugh, Grant A7074 from the Natural Sciences and Engineering Research Council of Canada to Tom N. Tombaugh, and by Grant A6378 from the Natural Sciences and Engineering Research Council of Canada to Angelo Santi.
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Santi, A., Tombaugh, J. & Tombaugh, T.N. Differential effects of omitting comparison stimuli on symbolic and identity matching to sample: Evidence for altered instructional processes in pigeon short-term memory. Animal Learning & Behavior 10, 152–158 (1982). https://doi.org/10.3758/BF03212263
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DOI: https://doi.org/10.3758/BF03212263