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Abstract:

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.

Registro:

Documento: Artículo
Título:Parsing a perceptual decision into a sequence of moments of thought
Autor:Graziano, M.; Polosecki, P.; Shalom, D.E.; Sigman, M.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and Instituto de Física de Buenos Aires, Pabellón 1, Ciudad Universitaria, CP 1428, Buenos Aires, Argentina
The Rockefeller University, New York, NY, United States
Palabras clave:Decision-making; Mental algorithms; Sequential operations; Vision; adult; article; chronosequence; cognition; decision making; female; human; human experiment; male; mental performance; mental task; moment of thought; motor performance; thinking; time perception
Año:2011
Volumen:5
DOI: http://dx.doi.org/10.3389/fnint.2011.00045
Título revista:Frontiers in Integrative Neuroscience
Título revista abreviado:Front. Integr. Neurosci.
ISSN:16625145
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_16625145_v5_n_p_Graziano.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16625145_v5_n_p_Graziano

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Citas:

---------- APA ----------
Graziano, M., Polosecki, P., Shalom, D.E. & Sigman, M. (2011) . Parsing a perceptual decision into a sequence of moments of thought. Frontiers in Integrative Neuroscience, 5.
http://dx.doi.org/10.3389/fnint.2011.00045
---------- CHICAGO ----------
Graziano, M., Polosecki, P., Shalom, D.E., Sigman, M. "Parsing a perceptual decision into a sequence of moments of thought" . Frontiers in Integrative Neuroscience 5 (2011).
http://dx.doi.org/10.3389/fnint.2011.00045
---------- MLA ----------
Graziano, M., Polosecki, P., Shalom, D.E., Sigman, M. "Parsing a perceptual decision into a sequence of moments of thought" . Frontiers in Integrative Neuroscience, vol. 5, 2011.
http://dx.doi.org/10.3389/fnint.2011.00045
---------- VANCOUVER ----------
Graziano, M., Polosecki, P., Shalom, D.E., Sigman, M. Parsing a perceptual decision into a sequence of moments of thought. Front. Integr. Neurosci. 2011;5.
http://dx.doi.org/10.3389/fnint.2011.00045