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  Prior probability modulates anticipatory activity in category-specific areas

Trapp, S., Lepsien, J., Kotz, S. A., & Bar, M. (2016). Prior probability modulates anticipatory activity in category-specific areas. Cognitive, Affective and Behavioral Neuroscience, 16(1), 135-144. doi:10.3758/s13415-015-0373-4.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-3912-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-1BA4-6
Genre: Journal Article

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 Creators:
Trapp, Sabrina1, Author              
Lepsien, Jöran2, Author              
Kotz, Sonja A.3, 4, Author              
Bar, Moshe5, Author
Affiliations:
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634558              
3Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              
4School of Psychological Sciences, University of Manchester, United Kingdom, ou_persistent22              
5Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan, Israel, ou_persistent22              

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Free keywords: Anticipation; Predictive coding; Fusiform face area; Bayesian; Statistical learning; Likelihood
 Abstract: Bayesian models are currently a dominant framework for describing human information processing. However, it is not clear yet how major tenets of this framework can be translated to brain processes. In this study, we addressed the neural underpinning of prior probability and its effect on anticipatory activity in category-specific areas. Before fMRI scanning, participants were trained in two behavioral sessions to learn the prior probability and correct order of visual events within a sequence. The events of each sequence included two different presentations of a geometric shape and one picture of either a house or a face, which appeared with either a high or a low likelihood. Each sequence was preceded by a cue that gave participants probabilistic information about which items to expect next. This allowed examining cue-related anticipatory modulation of activity as a function of prior probability in category-specific areas (fusiform face area and parahippocampal place area). Our findings show that activity in the fusiform face area was higher when faces had a higher prior probability. The finding of a difference between levels of expectations is consistent with graded, probabilistically modulated activity, but the data do not rule out the alternative explanation of a categorical neural response. Importantly, these differences were only visible during anticipation, and vanished at the time of stimulus presentation, calling for a functional distinction when considering the effects of prior probability. Finally, there were no anticipatory effects for houses in the parahippocampal place area, suggesting sensitivity to stimulus material when looking at effects of prediction.

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Language(s): eng - English
 Dates: 20152015-09-082016-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.3758/s13415-015-0373-4
PMID: 26350626
 Degree: -

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Title: Cognitive, Affective and Behavioral Neuroscience
  Abbreviation : Cogn Affect Behav Neurosci
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Austin, TX : Psychonomic Society
Pages: - Volume / Issue: 16 (1) Sequence Number: - Start / End Page: 135 - 144 Identifier: ISSN: 1530-7026
CoNE: https://pure.mpg.de/cone/journals/resource/1530-7026