Artículo
Parsing a perceptual decision into a sequence of moments of thought
Fecha de publicación:
09/2011
Editorial:
Frontiers Editorial
Revista:
Frontiers in Integrative Neuroscience
ISSN:
1662-5145
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Resumen
Theoretical, computational, and experimental studies have converged to a model of decision-making in which sensory evidence is stochastically integrated to a threshold, implementing a shift from an analog to a discrete form of computation. Understanding how this process can be chained and sequenced - as virtually all real-life tasks involve a sequence of decisions - remains an open question in neuroscience. We reasoned that incorporating a virtual continuum of possible behavioral outcomes in a simple decision task - a fundamental ingredient of real-life decision-making - should result in a progressive sequential approximation to the correct response. We used real-time tracking of motor action in a decision task, as a measure of cognitive states reflecting an internal decision process. We found that response trajectories were spontaneously segmented into a discrete sequence of explorations separated by brief stops (about 200ms) - which remained unconscious to the participants. The characteristics of these stops were indicative of a decision process - a "moment of thought": their duration correlated with the difficulty of the decision and with the efficiency of the subsequent exploration. Our findings suggest that simple navigation in an abstract space involves a discrete sequence of explorations and stops and, moreover, that these stops reveal a fingerprint of moments of thought. © 2011 Graziano, Polosecki, Shalom and Sigman.
Palabras clave:
Decision-Making
,
Mental Algorithms
,
Sequential Operations
,
Vision
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Graziano, Martín; Polosecki, Pablo; Shalóm, Diego Edgar; Sigman, Mariano; Parsing a perceptual decision into a sequence of moments of thought; Frontiers Editorial; Frontiers in Integrative Neuroscience; 5; 9-2011; 1-8
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