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Related Experiment Videos

The effect of feature frequency on short-term recognition memory.

E E Johns1, D J K Mewhort

  • 1Queen's University, Kingston, Ontario, Canada.

Memory & Cognition
|May 17, 2003
PubMed
Summary

Memory recognition speed depends on item frequency. Infrequent shapes in lures sped up rejection, while target item frequency affected recognition ease, challenging current memory models.

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Area of Science:

  • Cognitive Psychology
  • Human Memory
  • Experimental Psychology

Background:

  • Recognition memory is a fundamental cognitive process.
  • Sternberg's (1969) multitrial recognition-memory paradigm is a standard method for studying recognition.
  • Item frequency (how often an item appears) is a known factor influencing memory performance.

Purpose of the Study:

  • To investigate the influence of item frequency on recognition memory.
  • To examine how shape frequency affects the rejection of lures in recognition tasks.
  • To explore the impact of target item frequency on recognition accuracy and speed.

Main Methods:

  • Two experiments were conducted using Sternberg's (1969) multitrial recognition-memory paradigm.
  • Stimuli consisted of colored shapes, with shape frequency manipulated across trials.
  • Lures were presented, containing either extralist shapes or extralist colors with studied shapes.

Main Results:

  • For lures with extralist shapes, faster rejection occurred when the shape was infrequent.
  • Shape frequency did not affect rejection times for lures with studied shapes and extralist colors.
  • Low-frequency target items were recognized more easily than high-frequency targets.

Conclusions:

  • Correct rejections in recognition memory rely on contradictory evidence.
  • Item frequency significantly impacts recognition memory performance, affecting both lure rejection and target recognition.
  • Current models of recognition memory may need revision to account for the observed effects of item frequency.

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