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Istituto di scienze e tecnologie della cognizione

Torna all'elenco Contributi in rivista anno 2014

Contributo in rivista

Tipo: Articolo in rivista

Titolo: The Cat Is On the Mat. Or Is It a Dog? Dynamic Competition in Perceptual Decision Making

Anno di pubblicazione: 2014

Autori: Quinton, Jean-Charles; Volpi, Nicola Catenacci; Barca, Laura; Pezzulo, Giovanni

Affiliazioni autori: Univ Clermont Ferrand; IMT Inst Adv Studies; Natl Res Council Italy; Natl Res Council Italy

Autori CNR:

  • LAURA BARCA
  • GIOVANNI PEZZULO

Abstract: Recent neurobiological findings suggest that the brain solves simple perceptual decision-making tasks by means of a dynamic competition in which evidence is accumulated in favor of the alternatives. However, it is unclear if and how the same process applies in more complex, real-world tasks, such as the categorization of ambiguous visual scenes and what elements are considered as evidence in this case. Furthermore, dynamic decision models typically consider evidence accumulation as a passive process disregarding the role of active perception strategies. In this paper, we adopt the principles of dynamic competition and active vision for the realization of a biologically-motivated computational model, which we test in a visual categorization task. Moreover, our system uses predictive power of the features as the main dimension for both evidence accumulation and the guidance of active vision. Comparison of human and synthetic data in a common experimental setup suggests that the proposed model captures essential aspects of how the brain solves perceptual ambiguities in time. Our results point to the importance of the proposed principles of dynamic competition, parallel specification, and selection of multiple alternatives through prediction, as well as active guidance of perceptual strategies for perceptual decision-making and the resolution of perceptual ambiguities. These principles could apply to both the simple perceptual decision problems studied in neuroscience and the more complex ones addressed by vision research.

Pagine da: 539

Pagine a: 551

Pagine totali: 13

Rivista:

IEEE transactions on systems, man, and cybernetics Institute of Electrical and Electronics Engineers,
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 0018-9472

Numero volume: 44

Numero fascicolo: 5

DOI: 10.1109/TSMC.2013.2279664

Indicizzato da: ISI Web of Science (WOS) [000335226900003]

Parole chiave:

  • Active vision
  • dynamic models
  • perceptual decision-making
  • prediction

Strutture CNR:

 
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