Cited by 1,909Memory Processes and InfluencesMemory and Neural MechanismsCognitive Functions and Memory

How many memory systems are there?

Tulving, Endel·1985·American Psychologist

Abstract

Memory is made up of a number of interrelated systems, organized structures of operating components consisting of neural substrates and their behavioral and cognitive correlates. A ternary clas- sificatory scheme of is proposed in which procedural, semantic, and episodic constitute a monohierarchical arrangement: Episodic is a specialized subsystem of semantic memory, and semantic is a specialized subsystem of procedural The three systems differ from one another in a number of ways, including the kind of consciousness that characterizes their operations. The ternary scheme overlaps with di- chotomies and trichotomies of proposed by others. Evidence for multiple systems is derived from many sources. Illustrative data are provided by ex- periments in which direct priming effects are found to be both functionally and stochastically independent of recognition Solving puzzles in science has much in common with solving puzzles for amusement, but the two differ in important respects. Consider, for instance, the jigsaw puzzle that scientific activity frequently imitates. The everyday version of the puzzle is determinate: It consists of a target picture and jigsaw pieces that, when properly assembled, are guaranteed to match the picture. Scientific puzzles are indeter- minate: The number of pieces required to complete a picture is unpredictable; a particular piece may fit many pictures or none; it may fit only one picture, but the picture itself may be unknown; or the hypothetical picture may be imagined, but its com- ponent pieces may remain undiscovered. This article is about a current puzzle in the science of It entails an imaginary picture and a search for pieces that fit it. The picture, or the hypothesis, depicts as consisting of a number of systems, each system serving somewhat different purposes and operating according to some- what different principles. Together they form the marvelous capacity that we call by the single name of memory, the capacity that permits organisms to benefit from their past experiences. Such a picture is at variance with conventional wisdom that holds to be essentially a single system, the idea that memory is memory. The article consists of three main sections. In the first, 1 present some pretheoretical reasons for hypothesizing the existence of multiple systems and briefly discuss the concept of system. In the second, I describe a ternary classifi- catory scheme of memory--consisting of procedural, semantic, and episodic memory--and briefly com- pare this scheme with those proposed by others. In the third, I discuss the nature and logic of evidence for multiple systems and describe some experiments that have yielded data revealing independent effects of one and the same act of learning, effects seemingly at variance with the idea of a single system. I answer the question posed in the title of the article in the short concluding section.

Integrity signals

Registry

Crossref · 10.1037/0003-066x.40.4.385

Cites

91 of 91 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Tulving, E.
Affiliations
University of Toronto (CA)
Corresponding author
Tulving, Endel
Venue
American Psychologist
Published
1985-04
Volume
40
Issue
4
Pages
385-398
ISSN
  • 0003-066X (ISSN-L)
  • 1935-990X
OpenAlex
W2073667556
Cited by
1,909
References
91
Citations by year
2026: 28 · 2025: 30 · 2024: 43 · 2023: 49 · 2022: 48 · 2021: 57 · 2020: 68 · 2019: 63 · 2018: 51 · 2017: 39 · 2016: 50 · 2015: 47 · 2014: 84 · 2013: 60 · 2012: 80
FWCI
28.55
Type
journal article
Language
en
Open access
closed
Locations
American Psychologist (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
multiple memory systems, procedural memory, semantic memory, episodic memory, memory classification, recognition memory, neural substrates of memory, memory and consciousness, memory and emotion

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review