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Updated: Jul 17, 2026

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology
Published on: June 29, 2021
Computational mechanisms of object constancy for visual recognition revealed by event-related potentials
E Charles Leek1, Christine J Atherton, Guillaume Thierry
1School of Psychology, University of Wales, Bangor, UK. e.c.leek@bangor.ac.uk
Abstract:
This study examined the functional organisation of the computational processes underlying orientation-dependent and orientation-invariant two-dimensional object recognition. Participants identified two previously memorised novel shapes at different image plane orientations while event-related potentials (ERPs) were recorded. A centro-parietal ERP component was found that peaked between 350 and 450 ms post-stimulus onset and whose amplitude was modulated by stimulus orientation only for objects showing an orientation effect in response times. These findings are consistent with a serial model of object recognition whereby object constancy is achieved in at least two successive steps: orientation-invariant feature extraction and orientation-dependent visuo-spatial transformation.
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