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Sonja Stork 1, Jochen Müsseler 2 and A. H. C. van der Heijden 3Perceptual judgement and saccadic behaviour in a spatial distortion with briefy presented stimuli
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volume 6 issue 6, pages 1-14 |
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Perceptual judgement and saccadic behaviour in a spatial distortion with briefy presented stimuli |
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Sonja Stork 1, Jochen Müsseler 2 and A. H. C. van der Heijden 3 |
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1 Department of Psychology, Ludwig Maximilian University Munich, Germany
2 Department of Psychology, RWTH Aachen University, Germany
3 Faculteit der Sociale Wetenschappen, Instituut Psychologie, Leiden University, The Netherlands
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When observers are asked to localize the peripheral position of a small probe with respect to the
mid-position of a spatially extended comparison stimulus, they tend to judge the probe as being
more peripheral than the mid-position of the comparison stimulus. This relative mislocalization
seems to emerge from diferences in absolute localization, that is the comparison stimulus is localized more towards the fovea than the probe. The present study compared saccadic behaviour and
relative localization judgements in three experiments and determined the quantitative relationship between both measures. The results showed corresponding efects in localization errors and
saccadic behaviour. Moreover, it was possible to estimate the amount of the relative mislocalization by means of the saccadic amplitude.
Keywords: eye movement, saccade, localization, position, absolute position judgement, relative position judgement, space perception, visual illusion
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