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Original Articles and Reviews

Age Differences in Eye Movements During Reading: Degenerative Problems or Compensatory Strategy?

A Meta-Analysis

Published Online:November 19, 2018https://doi.org/10.1027/1016-9040/a000344

Abstract

Abstract. We report the results of a meta-analysis of 22 experiments comparing the eye movement data obtained from young (Mage = 21 years) and old (Mage = 73 years) readers. The data included six eye movement measures (mean gaze duration, mean fixation duration, total sentence reading time, mean number of fixations, mean number of regressions, and mean length of progressive saccade eye movements). Estimates were obtained of the typified mean difference, d, between the age groups in all six measures. The results showed positive combined effect size estimates in favor of the young adult group (between 0.54 and 3.66 in all measures), although the difference for the mean number of fixations was not significant. Young adults make in a systematic way, shorter gazes, fewer regressions, and shorter saccadic movements during reading than older adults, and they also read faster. The meta-analysis results confirm statistically the most common patterns observed in previous research; therefore, eye movements seem to be a useful tool to measure behavioral changes due to the aging process. Moreover, these results do not allow us to discard either of the two main hypotheses assessed for explaining the observed aging effects, namely neural degenerative problems and the adoption of compensatory strategies.

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