Luminance and contrast affect binocular coordination in reading A Huckauf, A Koepsel, G Yuras |
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General Psychology, Ulm University, Germany
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| In studies of binocular coordination in reading, various vergence disparities were reported. Nuthmann and Kliegl (2009) observed more crossed, whereas Liversedge et al. (2006) observed more uncrossed disparaties. Several potential reasons for these differences have been investigated in the last years (e.g. Shillcock, 2010, Kirkby et al., 2013, Nyström, 2013). One still open question is whether the luminance of the screen produces variations in binocular coordination. In an earlier experiment we showed vergence disparities changing with the polarity. In order to examine effects of the font versus the background, we replicated this study and additionally presented the text either with dark letter or with bright letters on the same grey background. Before, the participant’s eyes were calibrated with black-white Gabors on a grey background. The data replicated the former findings and show that the background color changes vergence disparity. |
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