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Influence of the predictability of events in the environment and of proactive motor inhibition on attentional effects in reaction time tasks.

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Author(s):
Fernanda Amadei Sais
Total Authors: 1
Document type: Doctoral Thesis
Press: São Paulo.
Institution: Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI)
Defense date:
Examining board members:
Marcus Vinicius Chrysostomo Baldo; Peter Maurice Erna Claessens; André Mascioli Cravo; Odival Cezar Gasparotto; André Frazão Helene
Advisor: Marcus Vinicius Chrysostomo Baldo
Abstract

The ability to learn regularities in the environment and to use predictions about future events to allocate sensory processing and to implement motor control strategies are strong drivers of attentional effects. In this study we investigated if attention could be oriented in space using as a probabilistic cue the sequence at which target stimuli would appear at each side of a computer screen, when that sequence could be generated using Markov chains of order 1 and of order 2, which would require complex statistical learning. We found evidence that individuals are able to allocate attention according to this learning. Also, here we evaluate the level of proactive motor inhibition in a task and how it interacted with attentional effects. Results of reaction time measures and EEG indicate that, in tasks such as the ones used in this study, the effects a visual cue has on reaction times can be related to mechanisms of motor inhibitory control. (AU)

FAPESP's process: 11/20243-0 - Attentional capture modulation: an integrative model
Grantee:Fernanda Amadei Sais
Support Opportunities: Scholarships in Brazil - Doctorate