Title

Parafoveal magnification: Visual acuity does not modulate the perceptual span in reading

RIS ID

113205

Publication Details

Miellet, S., O'Donnell, P. & Sereno, S. (2009). Parafoveal magnification: Visual acuity does not modulate the perceptual span in reading. Psychological Science, 20 (6), 721-728.

Abstract

Models of eye guidance in reading rely on the concept of the perceptual span - the amount of information perceived during a single eye fixation, which is considered to be a consequence of visual and attentional constraints. To directly investigate attentional mechanisms underlying the perceptual span, we implemented a new reading paradigm - parafoveal magnification (PM) - that compensates for how visual acuity drops off as a function of retinal eccentricity. On each fixation and in real time, parafoveal text is magnified to equalize its perceptual impact with that of concurrent foveal text. Experiment 1 demonstrated that PM does not increase the amount of text that is processed, supporting an attentional-based account of eye movements in reading. Experiment 2 explored a contentious issue that differentiates competing models of eye movement control and showed that, even when parafoveal information is enlarged, visual attention in reading is allocated in a serial fashion from word to word. 2009 Association for Psychological Science.

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Link to publisher version (DOI)

http://dx.doi.org/10.1111/j.1467-9280.2009.02364.x