Abstract
The Role of Perceptual Expectation on Repetition Suppression: A Quest to Dissect the Differential Contribution of Probability of Occurrence and Event Predictability
Highlights
Stimulus repetition is associated with an automatic reduction of cortical activity (e.g., Walter et al, 1964)
A recent study attempting to replicate face-repetition effects on BOLD signal in the extrastriate visual cortex (Summerfield et al, 2008) reported no effect of repetition suppression (RS) on single inferotemporal neurons (Kaliukhovich and Vogels, 2011). This null finding provides indirect support to the idea that the effects of repetition would be largely associated to neural adaptation mechanisms rather than to “perceptual expectation.”
By changing the probability of occurrence these authors aimed to test the hypothesis that the repetition × expectation interaction should have appeared during stable periods rather than during volatile periods
Summary
Stimulus repetition is associated with an automatic reduction of cortical activity (e.g., Walter et al, 1964). A recent study attempting to replicate face-repetition effects on BOLD signal in the extrastriate visual cortex (Summerfield et al, 2008) reported no effect of RS on single inferotemporal neurons (Kaliukhovich and Vogels, 2011).
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