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Related Experiment Videos

Localized attentional interference affects object individuation, not feature detection.

Jason S McCarley1, Jeffrey R W Mounts

  • 1University of Illinois, Institute of Aviation, Aviation Human Factors Division, 1 Airport Road, Savoy, IL 61874, USA. mccarley@uiuc.edu

Perception
|March 16, 2007
PubMed
Summary
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Visual attention involves competition, where selecting one stimulus can hinder nearby ones. Interference between attended stimuli only occurs when identifying individual objects, not just detecting features.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Visual selective attention is theorized as a competition for neural resources.
  • Attentional selection of one stimulus can negatively impact processing of nearby stimuli.

Purpose of the Study:

  • To investigate the conditions under which reciprocal interference occurs between attended stimuli.
  • To differentiate interference effects based on task demands.

Main Methods:

  • Participants viewed displays with zero, one, or two target items amidst distractors.
  • Two tasks were employed: feature detection (presence of any target) and object individuation (exactly two targets).

Main Results:

  • Spatially mediated interference between target pairs was observed during the object-individuation task.

Related Experiment Videos

  • No significant interference was found in the feature-detection task.

    • Conclusions:

    • Localized interference between attended stimuli is contingent on the requirement to individuate objects.
    • Findings support competitive interaction models of attention, particularly when object resolution is necessary.