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Related Experiment Videos

Objects and events in the attentional blink.

Dianne M Sheppard1, John Duncan, Kinnron L Shapiro

  • 1School of Psychology, University of Wales, Bangor, Gwynedd. dianne.sheppard@med.monash.edu.au

Psychological Science
|September 11, 2002
PubMed
Summary

The attentional blink (AB) is not avoided when judging brief temporal gaps. An AB occurs when attention shifts to a new event, like a longer gap creating a distinct temporal stream.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • The attentional blink (AB) impairs processing of a second target (T2) when it follows closely after a first target (T1).
  • An exception to the AB was observed when T1 was a brief temporal gap in a letter stream, suggesting ABs require patterned targets.

Purpose of the Study:

  • To investigate whether the attentional blink (AB) is triggered by attention to patterned objects or by the parsing of temporal events.
  • To determine the conditions under which temporal judgments elicit or prevent the attentional blink.

Main Methods:

  • Experiments involved presenting rapid visual targets (T1 and T2) and requiring participants to perform duration judgments or identification tasks.
  • Perceptual judgments of letter streams with embedded gaps were used to analyze stream segmentation.

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  • The attentional blink was measured by the accuracy of T2 identification or discrimination.
  • Main Results:

    • Duration judgments of brief temporal gaps did not elicit an attentional blink.
    • The attentional blink was reestablished when T1 was an identifiable letter or a longer temporal gap.
    • Perceptual analysis revealed that longer gaps create distinct temporal streams, unlike brief gaps.

    Conclusions:

    • The attentional blink is not solely triggered by attention to patterned objects.
    • An attentional blink occurs when attention shifts to a newly defined event, such as a temporally distinct stream or a higher-level object identification.
    • Temporal events are parsed hierarchically, similar to spatial objects, influencing attentional blink phenomena.