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Effects of expectation on face perception and its association with expertise.
Mares, Inês; Smith, Fraser W; Goddard, E J; Keighery, Lianne; Pappasava, Michael; Ewing, Louise; Smith, Marie L.
Afiliación
  • Mares I; School of Psychological Sciences, Birkbeck College, University of London, London, UK. imares@ispa.pt.
  • Smith FW; William James Center for Research, Ispa - Instituto Universitário, Lisbon, Portugal. imares@ispa.pt.
  • Goddard EJ; School of Psychology, University of East Anglia, Norwich, UK.
  • Keighery L; School of Psychological Sciences, Birkbeck College, University of London, London, UK.
  • Pappasava M; School of Psychological Sciences, Birkbeck College, University of London, London, UK.
  • Ewing L; Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, UK.
  • Smith ML; School of Psychological Sciences, Birkbeck College, University of London, London, UK.
Sci Rep ; 14(1): 9402, 2024 04 24.
Article en En | MEDLINE | ID: mdl-38658575
ABSTRACT
Perceptual decisions are derived from the combination of priors and sensorial input. While priors are broadly understood to reflect experience/expertise developed over one's lifetime, the role of perceptual expertise at the individual level has seldom been directly explored. Here, we manipulate probabilistic information associated with a high and low expertise category (faces and cars respectively), while assessing individual level of expertise with each category. 67 participants learned the probabilistic association between a color cue and each target category (face/car) in a behavioural categorization task. Neural activity (EEG) was then recorded in a similar paradigm in the same participants featuring the previously learned contingencies without the explicit task. Behaviourally, perception of the higher expertise category (faces) was modulated by expectation. Specifically, we observed facilitatory and interference effects when targets were correctly or incorrectly expected, which were also associated with independently measured individual levels of face expertise. Multivariate pattern analysis of the EEG signal revealed clear effects of expectation from 100 ms post stimulus, with significant decoding of the neural response to expected vs. not stimuli, when viewing identical images. Latency of peak decoding when participants saw faces was directly associated with individual level facilitation effects in the behavioural task. The current results not only provide time sensitive evidence of expectation effects on early perception but highlight the role of higher-level expertise on forming priors.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Electroencefalografía / Reconocimiento Facial Límite: Adult / Female / Humans / Male Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Electroencefalografía / Reconocimiento Facial Límite: Adult / Female / Humans / Male Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido