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Related Experiment Videos

The "one-shot" hypothesis for context storage.

Kenneth J Malmberg1, Richard M Shiffrin

  • 1Department of Psychology, Iowa State University, Ames, IA 50011, USA. malmberg@iastate.edu

Journal of Experimental Psychology. Learning, Memory, and Cognition
|March 10, 2005
PubMed
Summary
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Spaced repetitions enhance memory recall by strengthening context cues, supporting the one-shot hypothesis. Other study methods like increased depth or duration do not improve this list strength effect.

Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • The list strength effect (LSE) in explicit free recall is theorized to result from context cuing.
  • The one-shot hypothesis suggests context is stored early in study, with limited further gains from extended study time or deeper processing.

Purpose of the Study:

  • To investigate how different strengthening operations impact the list strength effect (LSE) in explicit free recall.
  • To test the predictions of the one-shot hypothesis regarding context storage and LSE.

Main Methods:

  • Three experiments were conducted, manipulating study operations such as spaced repetitions, massed repetitions, increased study time, and depth of processing.
  • Participants engaged in explicit free recall tasks following various study conditions.

Main Results:

Related Experiment Videos

  • Spaced repetitions consistently produced a positive LSE, aligning with the one-shot hypothesis.
  • Increases in study time, depth of processing, and massed repetitions did not yield a significant positive LSE.

Conclusions:

  • The findings support the one-shot hypothesis, indicating that context storage is largely determined by initial study exposure.
  • Spaced repetitions are identified as a key factor for enhancing LSE, likely through effective context strengthening.
  • Context storage may serve as a crucial link between episodic and semantic memory systems.