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Periodic letter strokes within a word affect fixation disparity during reading

Jainta, S and Jaschinski, W and Wilkins, AJ (2010) 'Periodic letter strokes within a word affect fixation disparity during reading.' Journal of Vision, 10 (13). p. 2. ISSN 1534-7362


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We investigated the way in which binocular coordination in reading is affected by the spatial structure of text. Vergence eye movements were measured (EyeLink II) in 32 observers while they read 120 single German sentences (Potsdam Sentence Corpus) silently for comprehension. The similarity in shape between the neighboring strokes of component letters, as measured by the first peak in the horizontal auto-correlation of the images of the words, was found to be associated with (i) a smaller minimum fixation disparity (i.e. vergence error) during fixation; (ii) a longer time to reach this minimum disparity and (iii) a longer overall fixation duration. The results were obtained only for binocular reading: no effects of auto-correlation could be observed for monocular reading. The findings help to explain the longer reading times reported for words and fonts with high auto-correlation and may also begin to provide a causal link between poor binocular control and reading difficulties. © ARVO.

Item Type: Article
Uncontrolled Keywords: fixation disparity; stripes; auto-correlation; fixation duration; vergence
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculty of Science and Health
Faculty of Science and Health > Psychology, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 21 Nov 2011 14:02
Last Modified: 15 Jan 2022 00:36

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