Abstract
Subjects’ eye fixations in a target region were examined as a function of how far the eye was from the beginning of a target word on the previous fixation. Prior to fixation of the target word, a letter string in the target location (which was then in the parafovea) was either visually similar or visually dissimilar to the target word. The results indicated that letter information was extracted from the target location when the eyes were at least nine characters from it. However, at such far distances, the parafoveal information extracted affected only the gaze duration on the target word, whereas at nearer distances, it affected both the gaze duration and the first-fixation duration. These data indicated that the decision to adjust the length of a saccade can be made after the decision to move the eye. In addition, the lengths of saccades and times to examine words were positively correlated: a longer saccade onto the target word was associated with longer gaze durations on both the target word and the prior word, and skipping the target word was associated with a longer last fixation on the previous word.
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This research represents a totally collaborative effort, and the order of the authors is random. The study was conducted while the third author held an NIMH postdoctoral fellowship at the University of Massachusetts, and the research was supported by Grants HD12727 and HD17246 from the National Institute of Child Health and Human Development.
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Pollatsek, A., Rayner, K. & Balota, D.A. Inferences about eye movement control from the perceptual span in reading. Perception & Psychophysics 40, 123–130 (1986). https://doi.org/10.3758/BF03208192
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DOI: https://doi.org/10.3758/BF03208192