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Related Experiment Videos

Attentional modulation of the gap effect.

Jay Pratt1, Clara M Lajonchere, Richard A Abrams

  • 1Department of Psychology, University of Toronto, 100 St. George Street, Toronto, Ont., Canada M5S 3G3. pratt@psych.utoronto.ca

Vision Research
|March 10, 2006
PubMed
Summary
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Attention plays a key role in the gap effect, a phenomenon influencing eye movements. Removing attended stimuli before a target appears speeds up saccade initiation, confirming attention

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Ophthalmology

Background:

  • The gap effect describes faster saccade initiation to peripheral targets when fixation disappears before target onset.
  • Potential mechanisms, including attention, have been proposed to explain the gap effect.
  • Previous research shows disagreement on attention's role in the gap effect.

Purpose of the Study:

  • To investigate the role of attention in the gap effect.
  • To determine if attention modulates saccade latency during the gap effect.

Main Methods:

  • Subjects were instructed to attend to a specific portion of a complex fixation stimulus.
  • The attended or unattended portion of the fixation stimulus was removed before the saccade target appeared.
  • Saccade initiation latency was measured under both conditions.

Related Experiment Videos

Main Results:

  • Saccade initiation latency was significantly reduced when the attended portion of the fixation stimulus was removed.
  • This finding indicates that attention influences the gap effect.

Conclusions:

  • Attention is a crucial mechanism contributing to the gap effect.
  • These findings advance our understanding of eye movement control and attentional mechanisms.