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31-01-2018 | Original Article

Object discrepancy modulates feature prediction across eye movements

Auteurs: Cassandra Philine Köller, Christian H. Poth, Arvid Herwig

Gepubliceerd in: Psychological Research | Uitgave 1/2020

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Abstract

Object perception across saccadic eye movements is assumed to result from integrating two information sources: incoming peripheral object information and information from a foveal prediction (Herwig and Schneider, J Exp Psychol Gen 143(5):1903–1922, 2014, Herwig, J Vis 15(16), 7, 2015). Predictions are supposed to be based on transsaccadic associations of peripheral and foveal object information. The main function of these predictions may be to conceal discrepancies in resolution and locations across saccades. Here we ask how predictions are affected by discrepancies between peripheral and foveal objects. Participants learned unfamiliar transsaccadic associations by making saccades to objects whose shape systematically changed during the saccade. Importantly, we manipulated the size of this change between participants to induce different magnitudes of object discrepancy. In a subsequent test, we found that judgment shifts of peripheral shape perception toward the predicted foveal input depended on change size during acquisition. Specifically, the contribution of prediction decreased for large changes but did not reach zero, showing that even for large changes (i.e., square to circle or vice versa) the prediction was not ignored completely. These findings indicate that object discrepancy during learning determines how much the resulting foveal prediction contributes to perception in the periphery.
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Metagegevens
Titel
Object discrepancy modulates feature prediction across eye movements
Auteurs
Cassandra Philine Köller
Christian H. Poth
Arvid Herwig
Publicatiedatum
31-01-2018
Uitgeverij
Springer Berlin Heidelberg
Gepubliceerd in
Psychological Research / Uitgave 1/2020
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-018-0988-5

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