Event-Related Potential Effects of Object Recognition depend on Attention and Part-Whole Configuration.

Gosling, A., Thomas, V., De Fockert, J. and Richardson-Klavehn, A., 2016. Event-Related Potential Effects of Object Recognition depend on Attention and Part-Whole Configuration. Frontiers in Human Neuroscience, 10, p. 478.

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DOI: 10.3389/fnhum.2016.00478


The effects of spatial attention and part-whole configuration on recognition of repeated objects were investigated with behavioral and event-related potential (ERP) measures. Short-term repetition effects were measured for probe objects as a function of whether a preceding prime object was shown as an intact image or coarsely scrambled (split into two halves) and whether or not it had been attended during the prime display. In line with previous behavioral experiments, priming effects were observed from both intact and split primes for attended objects, but only from intact (repeated sameview) objects when they were unattended. These behavioral results were reflected in ERP waveforms at occipital–temporal locations as more negative-going deflections for repeated items in the time window between 220 and 300 ms after probe onset (N250r).Attended intact images showed generally more enhanced repetition effects than split ones. Unattended images showed repetition effects only when presented in an intact configuration, and this finding was limited to the right-hemisphere electrodes. Repetition effects in earlier (before 200 ms) time windows were limited to attended conditions at occipito-temporal sites during the N1, a component linked to the encoding of object structure, while repetition effects at central locations during the same time window (P150) were found for attended and unattended probes but only when repeated in the same intact configuration. The data indicate that view-generalization is mediated by a combination of analytic (part-based) representations and automatic view-dependent representations.

Item Type:Article
Additional Information:AG was supported by Economic and Social Research Council (ESRC) Grant PTA-050-01364. AR-K was supported by German Research Foundation (DFG) Grants RI-1847 and SFB779-TPA10 and by the Alexander von Humboldt Foundation. The authors thank Jules Davidoff for his input during the early stages of the project.
Uncontrolled Keywords:EEG, ERPs, event-related potentials, object recognition, repetition, view-dependence
Group:Faculty of Science & Technology
ID Code:24792
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:28 Sep 2016 13:50
Last Modified:18 Oct 2016 09:01


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