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Related Experiment Videos

Bottom-up and top-down control in visual search.

Wieske van Zoest1, Mieke Donk

  • 1Department of Cognitive Psychology, Vrije Universiteit, van der Boechorststraat 1, 1081 BT Amsterdam, The Netherlands. w.van.zoest@psy.vu.nl

Perception
|November 4, 2004
PubMed
Summary

Visual search performance improves when irrelevant distractors are less salient and dissimilar to the target. This study investigated how stimulus-driven and goal-driven attention interact during visual search tasks.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Attentional control is typically categorized as either stimulus-driven or goal-driven.
  • Independent manipulation of factors influencing these attentional modes is limited.
  • Understanding their interplay is crucial for visual search performance.

Purpose of the Study:

  • To independently manipulate stimulus-driven (salience) and goal-driven (similarity) factors in visual search.
  • To investigate the independent and interactive effects of these factors on attentional control.
  • To examine how these attentional control mechanisms affect visual search performance.

Main Methods:

  • Participants performed a visual search task involving line segments with varying orientations.

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  • Relative target-distractor salience and target-distractor similarity were independently manipulated.
  • Search performance was measured based on accuracy and response times.

    • Main Results:

    • Relative target-distractor salience and target-distractor similarity independently influenced search performance.
    • Search performance was enhanced when distractors were less salient and dissimilar to the target.
    • This suggests independent contributions of stimulus-driven and goal-driven control.

    Conclusions:

    • Stimulus-driven and goal-driven attentional control mechanisms operate independently in visual search.
    • Minimizing distractor salience and similarity optimizes visual search efficiency.
    • Findings inform models of attentional control and visual perception.