Visual antipriming: Evidence for ongoing adjustments of superimposed visual object representations |
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Authors: | Chad J Marsolek David M Schnyer Rebecca G Deason Maureen Ritchey Mieke Verfaellie |
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Institution: | (1) School of Psychology, University of Liverpool, Eleanor Rathbone Building, Bedford St. South, L69 7ZA Liverpool, England |
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Abstract: | A fundamental question of memory is whether the representations of different items are stored in localist/discrete or superimposed/overlapping
manners. Neural evidence suggests that neocortical areas underlying visual object identification utilize superimposed representations
that undergo continual adjustments, but there has been little corroborating behavioral evidence. We hypothesize that the representation
of an object is strengthened, after it is identified, via small representational changes; this strengthening is responsible
for repetition priming for that object, but it should also be responsible for antipriming of other objects that have representations
superimposed with that of the primed object. Functional evidence for antipriming is reported in young adults, amnesic patients,
and matched control participants, and neurocomputational models. The findings from patients dismiss explicit memory explanations,
and the models fit the behavioral performance exceptionally well. Putative purposes of priming and comparisons with other
theories are discussed. Priming and antipriming may reflect ongoing adjustments of superimposed representations in neocortex. |
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