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Related Experiment Videos

A two-stage model for multiple target detection in rapid serial visual presentation

M M Chun1, M C Potter

  • 1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge.

Journal of Experimental Psychology. Human Perception and Performance
|February 1, 1995
PubMed
Summary

The attentional blink (AB) impairs identifying a second target when it appears shortly after a first target. This study confirms AB occurs with letters among digits and proposes a two-stage model to explain these visual attention deficits.

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Area of Science:

  • Cognitive psychology
  • Visual attention research

Background:

  • The attentional blink (AB) is a phenomenon where identifying a second target is impaired if it appears within 200-500 ms after a first target.
  • Previous research (Raymond et al., 1992) established the AB effect in rapid serial visual presentation (RSVP).

Purpose of the Study:

  • To investigate the attentional blink (AB) using categorically defined targets (letters among nonletters).
  • To explore the factors influencing the AB, including local interference and target-distractor discriminability.

Main Methods:

  • Seven experiments were conducted using rapid serial visual presentation (RSVP) paradigms.
  • Stimuli included letter targets presented among digit distractors.
  • Experimental manipulations focused on the timing between targets and the discriminability of targets from distractors.

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Main Results:

  • The attentional blink (AB) was consistently observed for a second letter target among digit distractors.
  • The AB effect was also found for a third target in sequence.
  • Results indicated that the AB is triggered by local interference and modulated by the discriminability between the first target and subsequent distractors.

Conclusions:

  • The findings support a two-stage model of visual attention to account for the attentional blink.
  • Local interference and global discriminability are key factors influencing the AB phenomenon.