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Offset transients modulate attentional capture by sudden onsets

R Martin-Emerson1, A F Kramer

  • 1University of Illinois at Urbana-Champaign, USA.

Perception & Psychophysics
|July 1, 1997
PubMed
Summary
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Sudden new objects (onsets) capture attention more than non-onset stimuli. Environmental change influences stimulus-driven search, but not goal-directed search for these visual onsets.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Sudden onsets (new objects) typically capture attention in visual search tasks.
  • This attentional capture occurs regardless of whether the onset predicts target identity or location.
  • Non-onset stimuli are created by removing segments from premasks.

Purpose of the Study:

  • To investigate how offset transients modulate attentional capture by sudden onsets.
  • To examine the influence of stimulus and display ratios on attentional capture.
  • To differentiate the effects of environmental change on stimulus-driven versus goal-directed visual search.

Main Methods:

  • Systematic manipulation of the ratio of non-onset to onset stimuli (display ratio).
  • Systematic manipulation of the ratio of offset to onset segments (stimulus ratio).

Related Experiment Videos

  • Three experiments involving visual search tasks with varying stimulus conditions.

    • Main Results:

    • Increased stimulus ratio and display ratio enhanced visual search for onset targets.
    • Environmental change significantly influences stimulus-driven attentional capture.
    • Goal-directed search for sudden-onset targets remained largely unaffected by environmental change.

    Conclusions:

    • Attentional capture by sudden onsets is influenced by stimulus-driven factors like environmental change.
    • Environmental change has differential impacts on stimulus-driven and goal-directed visual search.
    • Understanding attentional capture requires considering both stimulus properties and search goals.