Abstract
The effects of within-session variations in the intertriai interval (ITI) and delay on pigeons’ memory for event duration were studied in delayed symbolic matching-to-sample tasks. Pigeons were trained to peck one color following a long (8 sec) sample and another color following a short (2 sec) sample. In the first three experiments, the baseline conditions included a 10-sec delay (retention interval) and a 45-sec ITI. During testing, the delay was varied from 0 to 20 sec, and the ITI that preceded the trial was varied from 5 to 90 sec. When the ITI and delay were manipulated separately (Experiments 1 and 2), the pigeons displayed a choose-short tendency when the delay was longer than 10 sec or when the ITI was longer than 45 sec, and a choose-long tendency when either the delay or the ITI was shorter than these baseline values. These effects occurred whether the sample was food access or light. When the ITI and delay were manipulated together, the pigeons showed a large choose-long error tendency when the short delay was tested together with a short ITI, and no systematic error tendency when the short delay was tested together with a longer ITI. A very large choose-short error tendency emerged on trials with a long delay and a long ITI; a reduced choose-short tendency was present when the long delay was presented together with a short ITI. In Experiment 4, the baseline conditions were a 0-sec delay and a 45-sec ITI. In this case variations in the ITI had a smaller and unidirectional effect: the pigeons showed a choose-long error tendency when the ITI was decreased, but no effect of ITI increases. Two hypotheses were proposed and discussed: (1) that pigeons judge sample durations relative to a background time composed of the ITI and delay, and (2) that the delay and ITI effects might arise from a combination of subjective shortening and proactive effects of samples from previous trials.
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References
Church, R. M. (1980). Short-term memory for time intervals.Learning & Motivation,11, 208–219.
Fetterman, J. G., &Dreyfus, L. R. (1986). Pair comparisons of duration.Behavioural Processes,12, 111–123.
Fetterman, J. G., Stubbs, D. A., Dreyfus, L. R., Regan, L. M., & Bernstein, E. H. (1985, April).Discrimination of duration ratios Paper presented at the meeting of the Eastern Psychological Association, Boston
Killeen, P. R., &Fetterman, J. G. (1988). A behavioral theory of timing.Psychological Review,95, 274–285.
Kraemer, P. J., Mazmanian, D. S., &Roberts, W. A. (1985) The choose-short effect in pigeon memory for event duration. Subjective shortening versus coding models.Animal Learning & Behavior,13, 349–354.
Meck, W. H., &Church, R., M. (1982). Discrimination of intertrial intervals in cross-modal transfer of duration.Bulletin of the Psychonomic Society,19, 234–236.
Roberts, W. A., &Kraemer, P. J. (1982). Some observations of the effects of intertrial interval and delay on delayed matching to sample in pigeonsJournal of Experimental Psychology: Animal Behavior Processes,8, 342–353.
Santi, A. (1984). The trial spacing effect in delayed matching-to-sample by pigeons is dependent upon the illumination condition during the intertrial interval.Canadian Journal of Psychology,38, 154–165.
Spetch, M. L. (1987). Systematic errors in pigeons’ memory for event duration Interaction between training and test delayAnimal Learning & Behavior,15, 1–5.
Spetch, M. L., & Sinha, S. S. (1988, November)Pigeons’ memory for time: Evidence for retrospective processing. Paper presented at the meeting of the Psychonomic Society, Chicago.
Spetch, M. L., &Wilkie, D. M. (1982). A systematic bias in pigeons’ memory for food and light durations.Behaviour Analysis Letters,2, 267–274.
Spetch, M. L., &Wilkie, D. M. (1983) Subjective shortening: A model of pigeons’ memory for event durations.Journal of Experimental Psychology. Animal Behavior Processes,9, 14–30.
Staddon, J. E. R. (1984). Time and memory.Annals of the New York Academy of Sciences,423, 322–334.
Stubbs, D. A. (1976). Scaling of stimulus duration by pigeons.Journal of the Experimental Analysis of Behavior,26, 15–25.
Stubbs, D. A., Dreyfus, L. R., & Fetterman, J. G. (1984). The perception of temporal events. In J. Gibbon & L. Allan (Eds.),Timing and time perception. Annals of the New York Academy of Sciences,423, 31–42.
Wilkie, D. M. (1984). Pigeons’ spatial memory: IV. Effects of intertrial interval manipulations on delayed matching of key locationsCanadian Journal of Psychology,38, 178–195.
Wilkie, D. M. (1988) Proactive effects in pigeons’ timing behavior Implications for an internal-clock model.Animal Learning & Behavior,16, 132–136.
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This research was supported by Natural Sciences and Engineering Research Council of Canada Operating Grants U0301 (Spetch) and A0305 (Rusak).
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Spetch, M.L., Rusak, B. Pigeons’ memory for event duration: Intertrial interval and delay effects. Animal Learning & Behavior 17, 147–156 (1989). https://doi.org/10.3758/BF03207629
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DOI: https://doi.org/10.3758/BF03207629