The distribution of fixation durations in infants and naive adults.

CM Harris, L Hainline, I Abramov, E Lemerise, C Camenzuli

Research output: Contribution to journalArticlepeer-review

Abstract

The distributions of durations of fixations from infants and free-viewing adults are shown to be basically exponential for different stimulus conditions. It is found that fixation duration can be divided into two periods. One, the alpha-period, is a refractory period during which a saccade does not occur and fluctuates across fixations. The other, the beta-period, is a random variable intrinsic to each fixation and constitutes a waiting-time for a saccade that occurs with constant probability per unit time. It is shown that mean duration decreases when stimulus size increases. These results suggest that fixations are terminated by saccades triggered by non-foveal stimulation.
Original languageEnglish
Pages (from-to)419-432
Number of pages0
JournalVision Res
Volume28
Issue number3
DOIs
Publication statusPublished - 1988

Keywords

  • Adult
  • Aging
  • Eye Movements
  • Fixation
  • Ocular
  • Humans
  • Infant
  • Newborn
  • Photic Stimulation
  • Reference Values
  • Saccades
  • Statistics as Topic
  • Time Factors

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