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Journal of the Experimental Analysis of Behavior logoLink to Journal of the Experimental Analysis of Behavior
. 1985 Jul;44(1):15–34. doi: 10.1901/jeab.1985.44-15

Characteristics of forgetting functions in delayed matching to sample

K Geoffrey White
PMCID: PMC1348158  PMID: 16812424

Abstract

Performance of pigeons in delayed matching-to-sample procedures was measured in terms of an index of discriminability derived from the difference between logarithms of ratios of choice responses to comparison stimuli following the different sample stimuli. Forgetting functions that plotted discriminability as a function of delay-interval duration were well described by a simple negative exponential function with two parameters, one describing initial discriminability of sample stimuli at zero delay (log d0) and the other describing rate of decrement in discriminability with increasing delay-interval duration (b). With the difference between wavelength values of the comparison stimuli held constant, a large difference between wavelengths of the sample stimuli resulted in a higher log d0 value than that for a small difference between sample stimuli, without changing the rate of decrement in discriminability, b. An increase in the fixed-ratio requirement for sample-key responding produced an increase in log d0 without affecting b, and interpolation of ambient illumination in the delay interval increased b without influencing log d0. Both parameters changed when intertrial-interval duration was varied. The result of variation in the point of interpolation of ambient illumination in the delay interval indicated that levels of discriminability at longer delays were independent of discriminability levels at earlier delays, consistent with the properties of the exponential function. Functions relating performance to delay-interval duration were suggested to have two characteristics: discriminability of the sample stimuli in the absence of a delay between the stimuli and the behavior they occasion, and rate of attenuation in discriminability with increasing delay-interval duration.

Keywords: remembering, discriminability, delay-interval functions, delayed matching to sample, key peck, pigeon

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Selected References

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  1. Baum W. M. On two types of deviation from the matching law: bias and undermatching. J Exp Anal Behav. 1974 Jul;22(1):231–242. doi: 10.1901/jeab.1974.22-231. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Berryman R., Cumming W. W., Nevin J. A. Acquisition of delayed matching in the pigeon. J Exp Anal Behav. 1963 Jan;6(1):101–107. doi: 10.1901/jeab.1963.6-101. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Branch M. N. On the role of "memory" in the analysis of behavior. J Exp Anal Behav. 1977 Sep;28(2):171–179. doi: 10.1901/jeab.1977.28-171. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Carter D. E., Eckerman D. A. Symbolic matching by pigeons: rate of learning complex discriminations predicted from simple discriminations. Science. 1975 Feb 21;187(4177):662–664. doi: 10.1126/science.1114318. [DOI] [PubMed] [Google Scholar]
  5. Cohen L. R., Looney T. A., Brady J. H., Aucella A. F. Differential sample response schedules in the acquisition of conditional discriminations by pigeons. J Exp Anal Behav. 1976 Sep;26(2):301–314. doi: 10.1901/jeab.1976.26-301. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Davison M. C., Tustin R. D. The relation between the generalized matching law and signal-detection theory. J Exp Anal Behav. 1978 Mar;29(2):331–336. doi: 10.1901/jeab.1978.29-331. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Holt G. L., Shafer J. N. Function of intertrial interval in matching-to-sample. J Exp Anal Behav. 1973 Jan;19(1):181–186. doi: 10.1901/jeab.1973.19-181. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Jans J. E., Catania A. C. Short-term remembering of discriminative stimuli in pigeons. J Exp Anal Behav. 1980 Sep;34(2):177–183. doi: 10.1901/jeab.1980.34-177. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Kendrick D. F., Rilling M., Stonebraker T. B. Stimulus control of delayed matching in pigeons: Directed forgetting. J Exp Anal Behav. 1981 Sep;36(2):241–251. doi: 10.1901/jeab.1981.36-241. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. McCarthy D. Measures of response bias at minimum-detectable luminance levels in the pigeon. J Exp Anal Behav. 1983 Jan;39(1):87–106. doi: 10.1901/jeab.1983.39-87. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Nelson K. R., Wasserman E. A. Temporal factors influencing the pigeon's successive matching-to-sample performance: sample duration, intertrial interval, and retention interval. J Exp Anal Behav. 1978 Sep;30(2):153–162. doi: 10.1901/jeab.1978.30-153. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Reynolds T. J., Medin D. L. Stimulus interaction and between-trials proactive interference in monkeys. J Exp Psychol Anim Behav Process. 1981 Oct;7(4):334–347. [PubMed] [Google Scholar]
  13. Roberts W. A. Distribution of trials and intertrial retention in delayed matching to sample with pigeons. J Exp Psychol Anim Behav Process. 1980 Jul;6(3):217–237. doi: 10.1037//0097-7403.6.3.217. [DOI] [PubMed] [Google Scholar]
  14. Roberts W. A., Kraemer P. J. Some observations of the effects of intertrial interval and delay on delayed matching to sample in pigeons. J Exp Psychol Anim Behav Process. 1982 Oct;8(4):342–353. [PubMed] [Google Scholar]
  15. Roediger H. L., 3rd Memory metaphors in cognitive psychology. Mem Cognit. 1980 May;8(3):231–246. doi: 10.3758/bf03197611. [DOI] [PubMed] [Google Scholar]
  16. Shimp C. P., Moffitt M. Short-term memory in the pigeon: delayed-pair-comparison procedures and some results. J Exp Anal Behav. 1977 Jul;28(1):13–25. doi: 10.1901/jeab.1977.28-13. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Simon H. A. A note on Jost's Law and exponential forgetting. Psychometrika. 1966 Dec;31(4):505–506. doi: 10.1007/BF02289520. [DOI] [PubMed] [Google Scholar]
  18. Tranberg D. K., Rilling M. Delay-interval illumination changes interfere with pigeon short-term memory. J Exp Anal Behav. 1980 Jan;33(1):39–49. doi: 10.1901/jeab.1980.33-39. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. White K. G., McKenzie J. Delayed stimulus control: recall for single and relational stimuli. J Exp Anal Behav. 1982 Nov;38(3):305–312. doi: 10.1901/jeab.1982.38-305. [DOI] [PMC free article] [PubMed] [Google Scholar]

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