Cited by 239Memory Processes and InfluencesMemory and Neural MechanismsCognitive Functions and Memory

Genuine power curves in forgetting: A quantitative analysis of individual subject forgetting functions

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Wixted, John T., Ebbesen, Ebbe B.·1997·Memory & Cognition

Abstract

Wixted and Ebbesen (1991) showed that forgetting functions produced by a variety of procedures are often well described by the power function, at-b, where a and b are free parameters. However, all of their analyses were based on data arithmetically averaged over subjects. R. B. Anderson and Tweney (1997) argue that the power law of forgetting may be an artifact of arithmetically averaging individual subject forgetting functions that are truly exponential in form and that geometric averaging would avoid this potential problem. We agree that researchers should always be cognizant of the possibility of averaging artifacts, but we also show that our conclusions about the form of forgetting remain unchanged (and goodness-of-fit statistics are scarcely affected by) whether arithmetic or geometric averaging is used. In addition, an analysis of individual subject forgetting functions shows that they, too, are described much better by a power function than by an exponential.

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Crossref · 10.3758/bf03211316

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  • Forgetting curves are better described by a power function than by an exponential function, regardless of whether arithmetic or geometric averaging is used.

    “However, in 1997, Wixted et al. [89] conducted a series of experiments showing that forgetting curves are better described by a power function than by an exponential function, regardless of whether arithmetic or geometric averaging is used.”

    From Human-inspired Perspectives: A Survey on AI Long-term Memory (2024) · cites this paper as [89]

  • The forgetting process of human memory can be modeled by various types of functions, such as the exponential function and the power function.

    “Moreover, as mentioned in Sec. 3.2.3, the forgetting process of human memory can be modeled by various types of functions, such as the exponential function [106] and the power function [89].”

    From Human-inspired Perspectives: A Survey on AI Long-term Memory (2024) · cites this paper as [89]

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Authors
Wixted, J. T., & Ebbesen, E. B.
Affiliations
University of California San Diego (US)
Corresponding author
Wixted, John T.
Venue
Memory & Cognition
Published
1997-09
Volume
25
Issue
5
Pages
731-739
ISSN
  • 0090-502X (ISSN-L)
  • 1532-5946
OpenAlex
W2084883066
Cited by
237
References
27
Citations by year
2026: 7 · 2025: 4 · 2024: 10 · 2023: 10 · 2022: 8 · 2021: 11 · 2020: 11 · 2019: 9 · 2018: 11 · 2017: 12 · 2016: 10 · 2015: 12 · 2014: 12 · 2013: 15 · 2012: 6
FWCI
2.26
Type
journal article
Language
en
Open access
Locations
  • Memory & Cognition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Functions and Memory
Keywords
forgetting function, power function, exponential decay, individual differences, arithmetic averaging, geometric averaging, goodness of fit, memory decay
MeSH terms
Humans, Individuality, Models, Theoretical, Mental Recall, Retention, Psychology, Artifacts

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