Psychonomic Bulletin & Review

, Volume 4, Issue 1, pp 56–62 | Cite as

Distinguishing implicit and explicit learning

  • Michael A. Stadler


I agree with Dienes and Berry’s (1997) and Neal and Hesketh’s (1997) call for investigations of the qualitative differences between implicit and explicit learning and note that such investigations must be guided by a workable definition of what is implicit and by theories that predict what the qualitative differences might be. Following Schacter, Bowers, and Booker’s (1989) retrieval intentionality criterion, I propose using anencoding intentionality criterion to distinguish implicit from explicit learning; we can reasonably infer that implicit learning has occurred when a variable known to influence explicit learning has no effect in a comparable implicit learning condition. I then suggest that implicit learning depends on noncognitive, nonhierarchical associations, whereas explicit learning depends on cognitive, hierarchical associations, and briefly describe an experiment that confirms a qualitative difference between implicit and explicit learning predicted by this hypothesis.


Journal ofExperimental Psychology Implicit Memory Implicit Learning Serial Reaction Time Task Explicit Learning 
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  1. Barsalou, L. W. (1990). On the indistinguishability of exemplar memory and abstraction in category representation. In T. K. Srull & R. S. Wyer, Jr. (Eds.),Advances in social cognition, Vol. III: Content and process specificity in the effects of prior experiences (pp. 61–88). Hillsdale, NJ: Erlbaum.Google Scholar
  2. Bransford, J. D., Franks, J. J., Morris, C. D., &Stein, B. S. (1979). Some general constraints on learning and memory research. In L. S. Cermak & F. I. M. Craik (Eds.),Levels of processing in human memory (pp. 331–354). Hillsdale, NJ: Erlbaum.Google Scholar
  3. Brewer, W. F. (1974). There is no convincing evidence for operant or classical conditioning in adult humans. In W. B. Weimer & D. S. Palermo (Eds.),Cognition and the symbolic processes (pp. 1–61). Hillsdale, NJ: Erlbaum.Google Scholar
  4. Caccioppo, J. T., &Petty, R. E. (1982). The need for cognition.Journal of Personality & Social Psychology,42, 116–131.CrossRefGoogle Scholar
  5. Cheesman, J., &Merikle, P. M. (1986). Distinguishing conscious from unconscious perceptual processes.Canadian Journal of Psychology,40, 343–367.PubMedGoogle Scholar
  6. Cohen, A., Ivry, R. I., &Keele, S. W. (1990). Attention and structure in sequence learning.Journal of Experimental Psychology: Learning, Memory, & Cognition,16, 17–30.CrossRefGoogle Scholar
  7. Curran, T., &Keele, S. W. (1993). Attentional and nonattentional forms of sequence learning.Journal of Experimental Psychology: Learning, Memory, & Cognition,19, 189–202.CrossRefGoogle Scholar
  8. Dienes, Z., &Berry, D. (1997). Implicit learning: Below the subjective threshold.Psychonomic Bulletin & Review,4, 3–23.Google Scholar
  9. Dulany, D. E. (1961). Hypotheses and habits in verbal “operant conditioning.”Journal of Abnormal & Social Psychology,63, 251–263.CrossRefGoogle Scholar
  10. Dulany, D. E., Carlson, R. A., &Dewey, G. I. (1984). A case of syntactic learning and judgment: How conscious and how abstract?Journal of Experimental Psychology: General,113, 541–555.CrossRefGoogle Scholar
  11. Dulany, D. E., Carlson, R. A., &Dewey, G. I. (1985). On consciousness in syntactic learning and judgment: A reply to Reber, Allen, and Regan.Journal of Experimental Psychology: General,114, 25–32.CrossRefGoogle Scholar
  12. Ebbinghaus, H. (1964).Memory: A contribution to experimental psychology (H. A. Ruger & C. E. Bussenius, Trans.). New York: Dover. (Original work published 1885)Google Scholar
  13. Eich, E. (1989). Theoretical issues in state dependent memory. In H. L. Roediger III & F. I. M. Craik (Eds.),Varieties of memory and consciousness: Essays in honour of Endel Tulving (pp. 331–354). Hillsdale, NJ: Erlbaum.Google Scholar
  14. Eich, E. (1995). Searching for mood dependent memory.Psychological Science,6, 67–75.CrossRefGoogle Scholar
  15. Eriksen, C. W. (1960). Discrimination and learning without awareness: A methodological survey and evaluation.Psychological Review,67, 279–300.CrossRefPubMedGoogle Scholar
  16. Frensch, P. A., &Miner, C. S. (1994). Effects of presentation rate and individual differences in short-term memory capacity on an indirect measure of serial learning.Memory & Cognition,22, 95–110.Google Scholar
  17. Godden, D., &Baddeley, A. D. (1980). When does context influence recognition memory?British Journal of Psychology,66, 325–331.Google Scholar
  18. Goldstone, R. L., &Kruschke, J. K. (1994). Are rules and instances subserved by separate systems?Behavioral & Brain Sciences,17, 405.Google Scholar
  19. Graf, P., &Schacter, D. L. (1987). Selective effects of interference on implicit and explicit memory for new associations.Journal of Experimental Psychology: Learning, Memory, & Cognition,11, 45–53.CrossRefGoogle Scholar
  20. Green, R. E. A., &Shanks, D. R. (1993). On the existence of independent explicit and implicit learning systems: An examination of some evidence.Memory & Cognition,21, 304–317.Google Scholar
  21. Greenwald, A. G. (1992). New look 3: Unconscious cognition reclaimed.American Psychologist,47, 766–779.CrossRefPubMedGoogle Scholar
  22. Hayes, N. A., &Broadbent, D. E. (1988). Two modes of learning for interactive tasks.Cognition,28, 249–276.CrossRefPubMedGoogle Scholar
  23. Holender, D. (1986). Semantic activation without conscious identification in dichotic listening, parafoveal vision, and visual masking: A survey and appraisal.Behavioral & Brain Sciences,9, 1–23.CrossRefGoogle Scholar
  24. Jacoby, L. L. (1991). A process dissociation framework: Separating automatic from intentional uses of memory.Journal of Memory & Language,30, 513–541.CrossRefGoogle Scholar
  25. Jacoby, L. L., Woloshyn, V., &Kelley, C. (1989). Becoming famous without being recognized: Unconscious influence of memory produced by dividing attention.Journal of Experimental Psychology: General,118, 115–125.CrossRefGoogle Scholar
  26. Knowlton, B. J., Mangels, J. A., &Squire, L. R. (1996, September 6). A neostriatal habit learning system in humans.Science,273, 1399–1402.CrossRefPubMedGoogle Scholar
  27. Knowlton, B. J., Ramus, S. J., &Squire, L. R. (1992). Intact artificial grammar learning in amnesia: Dissociation of classification learning and explicit memory for specific instances.Psychological Science,3, 172–179.CrossRefGoogle Scholar
  28. Knowlton, B. J., &Squire, L. R. (1994). The information acquired during artificial grammar learning.Journal of Experimental Psychology: Learning, Memory, & Cognition,20, 79–91.CrossRefGoogle Scholar
  29. Lewicki, P. (1986).Nonconscious social information processing. New York: Academic Press.Google Scholar
  30. Mathews, R. C. (1990). Abstractness of implicit grammar knowledge: Comments on Perruchet and Pacteau’s analysis of synthetic grammar learning.Journal of Experimental Psychology: General,119, 412–416.CrossRefGoogle Scholar
  31. Merikle, P. M. (1994). On the futility of attempting to demonstrate null awareness.Behavioral & Brain Sciences,17, 412.Google Scholar
  32. Miller, G. A. (1956). The magical number seven, plus or minus two: Some limits on our capacity for processing information.Psychological Review,63, 81–97CrossRefPubMedGoogle Scholar
  33. Musen, G., &Squire, L. R. (1993). Implicit learning of color-word associations using a Stroop paradigm.Journal of Experimental Psychology: Learning, Memory, & Cognition,19, 789–798.CrossRefGoogle Scholar
  34. Neal, A., &Hesketh, B. (1997). Episodic knowledge and implicit learning.Psychonomic Bulletin & Review,4, 24–37.Google Scholar
  35. Petri, H. L., &Mishkin, M. (1994, January–February). Behaviorism, cognitivism, and the neuropsychology of memory.American Scientist,82, 30–37.Google Scholar
  36. Reber, A. S. (1967). Implicit learning of artificial grammars.Journal of Verbal Learning & Verbal Behavior,6, 855–863.CrossRefGoogle Scholar
  37. Reber, A. S. (1969). Transfer of syntactic structure in synthetic languages.Journal of Experimental Psychology,81, 115–119.CrossRefGoogle Scholar
  38. Reber, A. S. (1976). Implicit learning of synthetic languages: The role of instructional set.Journal of Experimental Psychology: Human Learning & Memory,2, 88–94.CrossRefGoogle Scholar
  39. Reber, A. S. (1993).Implicit learning and tacit knowledge: An essay on the cognitive unconscious. New York: Oxford University Press.Google Scholar
  40. Reed, J., &Johnson, P. (1994). Assessing implicit learning with indirect tests: Determining what is learned about sequence structure.Journal of Experimental Psychology: Learning, Memory, & Cognition,20, 585–594.CrossRefGoogle Scholar
  41. Reingold, E. M., &Merikle, P. M. (1988). Using direct and indirect measures to study perception without awareness.Perception & Psychophysics,44, 563–575.Google Scholar
  42. Restle, F. (1970). Theory of serial pattern learning: Structural trees.Psychological Review,77, 481–495.CrossRefGoogle Scholar
  43. Roediger, H. L., III, &McDermott, K. (1993). Implicit memory in normal human subjects. In F. Boller & J. Grafman (Eds.),Handbook of neuropsychology (Vol. 8, pp. 63–130). Amsterdam: Elsevier.Google Scholar
  44. Roediger, H. L., III,Weldon, M. S., Stadler, M. A., &Riegler, G. L. (1992). Direct comparison of two implicit memory tests: Word fragment and word stem completion.Journal of Experimental Psychology: Learning, Memory, & Cognition,18, 1251–1269.CrossRefGoogle Scholar
  45. Schacter, D. L., Bowers, J. S., &Booker, J. (1989). Intention, awareness and implicit memory: The retrieval intentionality criterion. In S. Lewandowsky, J. Dunn, & K. Kirsner (Eds.),Implicit memory: Theoretical issues (pp. 47–65). Hillsdale, NJ: Erlbaum.Google Scholar
  46. Shanks, D. R., &St. John, M. F. (1994). Characteristics of dissociable human learning systems.Behavioral & Brain Sciences,17, 367–447.CrossRefGoogle Scholar
  47. Slamecka, N. J. (1985). Ebbinghaus: Some associations.Journal of Experimental Psychology: Learning, Memory, & Cognition,11, 414–435.CrossRefGoogle Scholar
  48. Stadler, M. A. (1989). On learning complex procedural knowledge.Journal of Experimental Psychology: Learning, Memory, & Cognition,15, 1061–1069.CrossRefGoogle Scholar
  49. Stadler, M. A. (1995). Role of attention in implicit learning.Journal of Experimental Psychology: Learning, Memory, & Cognition,21, 674–685.CrossRefGoogle Scholar
  50. Stadler, M. A., &Frensch, P. A. (1994). Whither learning, whither memory?Behavioral & Brain Sciences,17, 423–424.Google Scholar
  51. Stanovich, K. E. (1992).How to think straight about psychology (3rd ed.). New York: HarperCollins.Google Scholar
  52. Thorndike, E. L. (1935).The psychology of wants, interests, and attitudes. New York: Appleton-Century.Google Scholar
  53. Tulving, E., &Thomson, D. M. (1973). Encoding specificity and retrieval processes in episodic memory.Psychological Review,80, 352–373.CrossRefGoogle Scholar
  54. Watkins, M. J., &Tulving, E. (1975). Episodic memory: When recognition fails.Journal of Experimental Psychology: General,104, 5–29.CrossRefGoogle Scholar
  55. Wickelgren, W. A. (1979). Chunking and consolidation: A theoretical synthesis of semantic networks, configuring, S-R versus cognitive learning, normal forgetting, the amnesic syndrome, and the hippocampal arousal system.Psychological Review,86, 44–60.CrossRefPubMedGoogle Scholar
  56. Wickens, D. D. (1938). The transference of conditioned extinction from one muscle group to the antagonistic muscle group.Journal of Experimental Psychology,22, 101–123.CrossRefGoogle Scholar

Copyright information

© Psychonomic Society, Inc 1997

Authors and Affiliations

  1. 1.Department of PsychologyUniversity of MissouriColumbia

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