The distribution of fixation durations in infants and naive adults
Vision ResearchPublished 1 January 1988
Christopher M. Harris, Louise Hainline, Israel Abramov, Elizabeth A. Lemerise, Cheryl A. Camenzuli
Citations77
SJR quartileQ2
SJR score0.63
SNIP0.89
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TL;DR
The distributions of durations of fixations from infants and free-viewing adults are shown to be basically exponential for different stimulus conditions and it is shown that mean duration decreases when stimulus size increases.
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.
Keywords
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