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Related Experiment Videos

Verbal recoding of visual stimuli impairs mental image transformations.

M A Brandimonte1, G J Hitch, D V Bishop

  • 1Dipartimento di Psicologia dell'Università di Trieste, Italy.

Memory & Cognition
|July 1, 1992
PubMed
Summary

Verbal recoding in short-term memory affects long-term memory encoding. Suppressing verbal rehearsal aids mental imagery for easy-to-name stimuli, while labeling hinders it for difficult-to-name stimuli.

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Area of Science:

  • Cognitive Psychology
  • Memory Research
  • Visual Perception

Background:

  • Short-term memory (STM) plays a crucial role in encoding information into long-term memory (LTM).
  • The process of verbal recoding, or subvocal rehearsal, is a common strategy used to maintain information in STM.
  • The impact of verbal recoding on the fidelity of mental images stored in LTM is not fully understood.

Purpose of the Study:

  • To investigate how verbal recoding of visual stimuli in STM affects LTM encoding.
  • To determine if verbal recoding impairs subsequent mental image operations.
  • To examine the differential effects of stimulus naming difficulty on this process.

Main Methods:

  • Two experiments were conducted using visual stimuli that, when rotated, revealed hidden letters.

Related Experiment Videos

  • Experiment 1 employed articulatory suppression to inhibit verbal rehearsal during stimulus learning.
  • Experiment 2 used verbal labeling to encourage reliance on verbal codes during learning.
  • Participants learned stimuli and then performed a mental rotation task to detect hidden letters.

    • Main Results:

    • Articulatory suppression significantly improved mental imagery performance for easy-to-name stimuli (Experiment 1).
    • Verbal labeling severely disrupted mental imagery performance for difficult-to-name stimuli (Experiment 2).
    • These findings suggest a complex interaction between verbal processing and visual imagery.

    Conclusions:

    • Verbal recoding of visual stimuli in STM during the learning phase disrupts the ability to generate accurate mental images from LTM.
    • The difficulty in naming stimuli moderates the detrimental effects of verbal recoding on mental imagery.
    • Relying on verbal codes for visual information can interfere with the formation and retrieval of veridical mental representations.