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An analysis of task difficulty using the visually degraded stimulus task.

K E Whitfield1, J W Elias, G Dore

  • 1Department of Psychology, McNeese State University, Lake Charles, LA 70609.

Perceptual and Motor Skills
|June 1, 1991
PubMed
Summary
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The Visually Degraded Stimulus Task aids in understanding visual memory priming effects. This study details its difficulty levels and program modifications for memory and neuropsychology research.

Area of Science:

  • Cognitive Psychology
  • Neuropsychology
  • Visual Perception

Background:

  • The Visually Degraded Stimulus Task (VDST) was developed in 1986.
  • It presents line drawings in complete and incomplete forms to assess identification thresholds.
  • The task is useful for studying visual memory and priming effects.

Purpose of the Study:

  • To discuss the utility of the Visually Degraded Stimulus Task.
  • To provide difficulty levels for incomplete picture identification under various priming conditions.
  • To offer modifications for enhancing the program's use in testing priming effects.

Main Methods:

  • Utilized 30 line drawings presented in complete and incomplete forms.
  • Assessed identification difficulty across three conditions: no prime, conceptual prime, and exact prime.

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  • Modified a microprocessor computer program to improve its functionality.

    • Main Results:

    • Difficulty levels for incomplete picture identification were determined for each drawing.
    • The study established thresholds for identification under different priming conditions.
    • Modifications were proposed to enhance the program's utility for memory research.

    Conclusions:

    • The Visually Degraded Stimulus Task is a valuable tool for studying visual memory.
    • The provided difficulty levels and program modifications increase its applicability in research.
    • The task and its enhancements are useful for memory and neuropsychology studies.