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Searching for multiple targets simultaneously: is it really possible?

D L Holmes, R Peper, L W Olsho

    Perceptual and Motor Skills
    |February 1, 1978
    PubMed
    Summary
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    This study on visual search found that subjects did not process multiple targets in parallel as previously suggested. Instead, participants tended to search for a master set of targets, influencing their performance.

    Area of Science:

    • Cognitive Psychology
    • Visual Perception
    • Human Information Processing

    Background:

    • Neisser's research suggested parallel processing of multiple targets in visual search.
    • Previous studies explored preattentive processing in visual search tasks.
    • The role of target set size in visual search requires further clarification.

    Purpose of the Study:

    • To clarify Neisser's findings on parallel processing of multiple visual targets.
    • To investigate visual search performance when target sets are not nested.
    • To examine the influence of target features and set size on search efficiency.

    Main Methods:

    • Subjects performed a visual search task with multiple, non-nested target sets.
    • Geometric forms with varying features were used as targets.

    Related Experiment Videos

  • Data were collected over 20 sessions with 12 trials per day for each subject.

    • Main Results:

    • Results contradicted Neisser's findings regarding parallel processing.
    • An interaction between session and target-set size was observed.
    • This interaction was opposite to the direction predicted by parallel preattentive processing models.

    Conclusions:

    • Parallel preattentive processing may not fully explain performance in this visual search task.
    • Subjects might employ a strategy of searching for a master set of targets.
    • Task performance appears influenced by a broader target set awareness rather than purely parallel processing.