In: PLOS ONE
7(3), e33651
[PDF, 270kB]
Abstract
Neural transmission latency would introduce a spatial lag when an object moves across the visual field, if the latency was not compensated. A visual predictive mechanism has been proposed, which overcomes such spatial lag by extrapolating the position of the moving object forward. However, a forward position shift is often absent if the object abruptly stops moving (motion-termination). A recent "correction-for-extrapolation" hypothesis suggests that the absence of forward shifts is caused by sensory signals representing 'failed' predictions. Thus far, this hypothesis has been tested only for extra-foveal retinal locations. We tested this hypothesis using two foveal scotomas: scotoma to dim light and scotoma to blue light. We found that the perceived position of a dim dot is extrapolated into the fovea during motion-termination. Next, we compared the perceived position shifts of a blue versus a green moving dot. As predicted the extrapolation at motion-termination was only found with the blue moving dot. The results provide new evidence for the correction-for-extrapolation hypothesis for the region with highest spatial acuity, the fovea.
Item Type: | Journal article |
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Form of publication: | Publisher's Version |
Faculties: | Psychology and Education Science Psychology and Education Science > Department Psychology > General and Experimental Psychology |
Subjects: | 100 Philosophy and Psychology > 150 Psychology |
URN: | urn:nbn:de:bvb:19-epub-15079-2 |
ISSN: | 1932-6203 |
Annotation: | The present work was supported by German research foundation (DFG) project SH166 |
Language: | English |
Item ID: | 15079 |
Date Deposited: | 03. May 2013, 10:59 |
Last Modified: | 04. Nov 2020, 12:55 |