Adaptive learning and forgetting in an unconventional experimental routine
Forgetting is often thought of as the inability to remember, but remembering and forgetting allow behavior to adapt to a changing environment in distinct and separable ways. Learning and forgetting were assessed concurrently in two pigeon experiments that involved the same unconventional routine where the schedule of reinforcement changed every session. Sessions were run back-to-back with a 23-h mid-session break such that in a single visit to the testing chamber, a pigeon completed the second half of one session and the first half of the next. The beginning of a new session was either signaled or unsignaled. Experiment 1 involved concurrent variable–interval variable–interval schedules with four possible reinforcer ratios. Response allocation was sensitive to the richer schedule and was retained through the mid-session break. Experiment 2 involved peak interval schedules of varying durations. Temporal discrimination was rapidly acquired before and after the mid-session break, but not retained. Signaling the session change decreased control by past contingencies in both experiments, demonstrating that learning and forgetting can be investigated separately. These results suggest that the temporal structure of training, such as multiple short daily sessions instead of one long session, can meaningfully impact measurement of animals’ capacity to forget and remember.
KeywordsAdaptive forgetting Choice Key peck Pigeons Rapid acquisition Temporal learning
We thank Matt Eckard, Shrinidhi Subramaniam and Alex Ward for helping collect data for this study. Thanks to Anthony McLean for his helpful comments on an earlier draft of this manuscript. Portions of this research were completed as part of the first and second authors’ theses in psychology at West Virginia University and were supported by the Eberly College of Arts and Sciences and the Department of Psychology.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national and institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institutional animal care and use committee at West Virginia University, where the studies were conducted.
- Ator AA (1991) Subjects and instrumentation. In: Lattal KA, Iversen IH (eds) Experimental analysis of behavior. Elsevier, Amsterdam, pp 1–62Google Scholar
- Bolles RC (1985) Short-term memory and attention. In: Nilsson L, Archer T, Nilsson L, Archer T (eds) Perspectives on learning and memory. Lawrence Erlbaum Associates Inc., Hillsdale, pp 137–146Google Scholar
- Gleitman H (1971) Forgetting of long-term memories in animals. In: Honig WK, James PHR (eds) Animal memory. Academic Press, San Diego, pp 1–44Google Scholar
- Johnston JM, Pennypacker HS (2009) Strategies and tactics of behavioral research, 3rd edn. Routledge, New YorkGoogle Scholar
- Kimble GA (1961) Hilgard and Marquis' "Conditioning and learning."Google Scholar
- Kraemer P, Spear NE (1993) Retrieval processes and conditioning. In: Zentall TR (ed) Animal cognition: a tribute to Donald A. Riley. Lawrence Erlbaum Associates, Hillsdale, pp 87–107Google Scholar
- Rasberry CN, Lee SM, Robin L, Laris BA, Russell LA, Coyle KK, Nihiser AJ (2011) The association between school-based physical activity, including physical education, and academic performance: a systematic review of the literature. Prev Med Int J Devot Pract Theory 52:S10–S20. https://doi.org/10.1016/j.ypmed.2011.01.027 CrossRefGoogle Scholar
- Sidman M (1960) Tactics of scientific research. Basic Books, New YorkGoogle Scholar
- Skinner BF, Vaughan ME (1983) Enjoy old age: a program of self-management. Norton, New YorkGoogle Scholar
- Smith SM (2011) Blocking out blocks. In: Benjamin AS (ed) Successful remembering and successful forgetting. Psychology Press, New York, pp 153–174Google Scholar
- Spear NE (1971) Forgetting as retrieval failure, chap 2. In: Agranoff BW, Honig WK, James PHR (eds) Animal Memory. Academic Press, pp 45–109Google Scholar