Attention during sequences of saccades along marked and memorized paths

Timothy M. Gersch, Eileen Kowler, Brian S. Schnitzer, Barbara Anne Dosher

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Natural scenes are explored by combinations of saccadic eye movements and shifts of attention. The mechanisms that coordinate attention and saccades during ordinary viewing are not well understood because studies linking saccades and attention have focused mainly on single saccades made in isolation. This study used an orientation discrimination task to examine attention during sequences of saccades made through an array of targets and distractors. Perceptual measures showed that attention was distributed along saccadic paths when the paths were marked by color cues. When paths were followed from memory, attention rarely spread beyond the goal of the upcoming saccade. These different distributions of attention suggest the involvement of separate processes of attentional control during saccadic planning, one triggered by top-down selection of the saccadic target, and the other by activation linked to visual mechanisms not tied directly to saccadic planning. The concurrent activity of both processes extends the effective attentional field without compromising the accuracy, precision, or timing of saccades.

Original languageEnglish (US)
Pages (from-to)1256-1266
Number of pages11
JournalVision Research
Volume49
Issue number10
DOIs
StatePublished - Jun 2 2009

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems

Keywords

  • Attention
  • Eye movements
  • Motor control
  • Orientation discrimination
  • Saccades
  • Sequences

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