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Related Experiment Videos

Grouping in short-term verbal memory: is position coded temporally?

Honey L H Ng1, Murray T Maybery

  • 1Department of Psychology, University of Western Australia, Nedlands, Australia.

The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology
|June 6, 2002
PubMed
Summary

This study investigated how temporal grouping affects short-term verbal recall. Findings suggest item position coding is independent of timing relative to group onset, supporting time-independent memory models.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory

Background:

  • Serial short-term verbal recall is influenced by temporal grouping, where pauses create item groups.
  • Existing models differ on whether positional information relies on timing relative to group onset.

Purpose of the Study:

  • To investigate if the coding of item position in serial short-term verbal recall is time-dependent.
  • To differentiate between time-dependent and time-independent models of memory.

Main Methods:

  • Three experiments manipulated stimulus-onset asynchrony across groups within lists.
  • Consonant lists were presented visually (Exp 1), auditorily (Exp 2), and auditorily with suppression (Exp 3).
  • Order errors and intrusions were analyzed to assess positional coding.

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Main Results:

  • Across-group transpositions consistently reflected within-group serial position, not time from group onset.
  • Errors involving intrusions from previous lists also supported within-group serial position coding.
  • Results favored time-independent models over time-dependent models.

Conclusions:

  • Positional information in serial short-term verbal recall appears independent of the precise timing relative to group onset.
  • Findings support memory models where contextual information is not critically dependent on group-onset timing.
  • The study provides evidence for time-independent mechanisms in verbal memory.