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. 2008 Mar;48(8):1027-39.
doi: 10.1016/j.visres.2008.01.012. Epub 2008 Mar 3.

Eye position changes during reading fixations are spatially selective

Albrecht W Inhoff  1 , Matthew S Solomon, Bradley A Seymour, Ralph Radach
Affiliations

Eye position changes during reading fixations are spatially selective

Albrecht W Inhoff et al. Vision Res. 2008 Mar.

Abstract

Intra-fixation location changes were measured when one-line sentences written in lower or aLtErNaTiNg case were read. Intra-fixation location changes were common and their size was normally distributed except for a relatively high proportion of fixations without a discernible location change. Location changes that did occur were systematically biased toward the right when alternating case was read. Irrespective of case type, changes of the right eye were biased toward the right at the onset of sentence reading, and this spatial bias decreased as sentence reading progressed from left to right. The left eye showed a relatively stable right-directed bias. These results show that processing demands can pull the two fixated eyes in the same direction and that the response to this pull can differ for the right and left eye.

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Figures

Figure 1
Figure 1
The relative frequency of fixation durations during the reading of lower case text in Experiment 1.
Figure 2
Figure 2
The relative frequency of saccade sizes during the reading of lower case text in Experiment 1.
Figure 3
Figure 3
The relative frequency of location changes during reading fixations.
Figure 4
Figure 4
Mean size (in LS) of fixation location changes of the right eye as a function of change direction. Mean values are shown with standard errors of the mean.
Figure 5
Figure 5
The relative frequency of intra-fixation location changes of the right eye under binocular and monocular viewing conditions.
Figure 6
Figure 6
The relative frequency of fixation durations of the right and left eye during the reading of alternating case text.
Figure 7
Figure 7
The relative frequency of saccade sizes of the right and left eye during the reading of alternating case text.
Figure 8
Figure 8
The relative frequency of intra-fixation location changes of the right and left eye during the reading of alternating case text.
Figure 9
Figure 9
Intra-fixation location changes of the right and left eye as a function of the word order. Condition means and mean standard errors are shown.
Figure 10
Figure 10
Intra-fixation location changes of the right and left eye as a function of word length (in letters). Condition means and mean standard errors are shown.
See this image and copyright information in PMC

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