A rapid effect of stimulus quality on the durations of individual fixations during reading

Autor:	Mackenzie G. Glaholt, Eyal M. Reingold, Keith Rayner
Rok vydání:	2014
Předmět:	medicine.medical_specialty Communication Arts and Humanities (miscellaneous) business.industry Cognitive Neuroscience medicine Eye movement Experimental and Cognitive Psychology Audiology Fixation (psychology) Stimulus (physiology) business Psychology
Zdroj:	Visual Cognition. 22:377-389
ISSN:	1464-0716 1350-6285
DOI:	10.1080/13506285.2014.891542
Popis:	We developed a variant of the single fixation replacement paradigm (Yang & McConkie, 2001, 2004) in order to examine the effect of stimulus quality on fixation duration during reading. Subjects’ eye movements were monitored while they read passages of text for comprehension. During critical fixations, equal changes to the luminance of the background produced either an increase (Up-Contrast) or a decrease (Down-Contrast) of the contrast of the text. The durations of critical fixations were found to be lengthened in the Down-Contrast but not the Up-Contrast condition. Ex-Gaussian modelling of the distributions of fixation durations showed that the reduction in stimulus quality lengthened the majority of fixations, and a survival analysis estimated the onset of this effect to be approximately 141 ms following fixation onset. Because the stimulus quality of the text during critical fixations could not be predicted or parafoveally previewed prior to foveation, the present effect can be attributed to an immediate effect of stimulus quality on fixation duration.
Databáze:	OpenAIRE
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