The omnipresent prolongation of visual fixations: saccades are inhibited by changes in situation and in subject's activity

Vision Res. 2001;41(25-26):3345-51. doi: 10.1016/s0042-6989(01)00207-3.

Abstract

Presenting a distractor prolongs not only saccadic reaction times in paced tasks but also fixation durations in unpaced tasks. To investigate whether the effect of a distractor is a pure optomotor reflex, we used both visual and auditory distractors in an unpaced picture-viewing paradigm. Results show a distractor effect for both modalities. Analysis of data from previous studies showed similar effects, even in amodal shifts of attention. These findings challenge the hypothesis that the effect is modality-specific and suggest that the distractor effect may be another expression of the orienting reflex.

MeSH terms

  • Acoustic Stimulation / methods
  • Adult
  • Attention / physiology*
  • Female
  • Fixation, Ocular / physiology*
  • Humans
  • Male
  • Photic Stimulation / methods
  • Proportional Hazards Models
  • Reaction Time
  • Saccades / physiology*
  • Time Factors