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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: Modular and hierarchical brain organization to understand assimilation, accommodation and their relation to autism in reaching tasks: a developmental robotics hypothesis

Anno di pubblicazione: 2014

Autori: Caligiore, Daniele; Tommasino, Paolo; Sperati, Valerio; Baldassarre, Gianluca

Affiliazioni autori: Consiglio Nazionale delle Ricerche (CNR); Nanyang Technological University

Autori CNR:

  • GIANLUCA BALDASSARRE
  • DANIELE CALIGIORE
  • VALERIO SPERATI

Lingua: inglese

Abstract: By assimilation children embody sensorimotor experiences into already built mental structures. Conversely, by accommodation these structures are changed according to the child's new experience. Despite the intuitive power of these concepts to trace the course of sensorimotor development, they have gradually lost ground in psychology. This likely due to the lack of brain-related views capturing the dynamic mechanisms underlying them. Here we propose that brain modular and hierarchical organization is crucial to understanding assimilation/accommodation. We devise an experiment where a bio-inspired modular and hierarchical mixture-of-experts model guides a simulated robot to learn different reaching tasks by trial-and-error. The model gives a novel interpretation of assimilation/accommodation based on the functional organization of the experts allocated through learning. Assimilation occurs when the model adapts a copy of the expert trained for solving a task, to face another task requiring similar sensorimotor mappings. Experts storing similar sensorimotor mappings belong to the same functional module. Accommodation occurs when the model uses non-trained experts to face tasks requiring different sensorimotor mappings (generating a new functional group of experts). The model also provides a new theoretical framework to investigate assimilation/accommodation impairment, and proposes that such impairment might be related to autism spectrum disorder.

Lingua abstract: inglese

Pagine da: 304

Pagine a: 329

Pagine totali: 26

Rivista:

Adaptive behavior MIT Press,
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 1059-7123

Numero volume: 22

Numero fascicolo: 5

DOI: 10.1177/1059712314539710

Stato della pubblicazione: Published version

Indicizzato da: ISI Web of Science (WOS) [000342977700002]

Parole chiave:

  • Brain functional modularity
  • brain functional graph
  • Piaget
  • autism
  • connectome
  • hierarchical reinforcement learning
  • mixture-of-experts neural networks

Strutture CNR:

Allegati: Modular and hierarchical brain organization to understand assimilation, accommodation and their relation to autism in reaching tasks (application/pdf)

 
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