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Serial integration of sensory evidence for perceptual decisions and oculomotor responses

Lisi, Matteo and Morgan, Michael J and Solomon, Joshua A (2020) Serial integration of sensory evidence for perceptual decisions and oculomotor responses. Working Paper. Biorxiv/Cold Spring Harbor Laboratory. (Unpublished)

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Abstract

Perceptual decisions often require the integration of noisy sensory evidence over time. This process is formalized with sequential sampling models, where evidence is accumulated up to a decision threshold before a choice is made. Although classical accounts grounded in cognitive psychology tend to consider the process of decision formation and the preparation of the motor response as occurring serially, neurophysiological studies have proposed that decision formation and response preparation occur in parallel and are inseparable (Cisek, 2007; Shadlen et al., 2008). To address this serial vs. parallel debate, we developed a behavioural, reverse correlation protocol, in which the stimuli that influence perceptual decisions can be distinguished from the stimuli that influence motor responses. We show that the temporal integration windows supporting these two processes are distinct and largely non-overlapping, suggesting that they proceed in a serial or cascaded fashion.

Item Type: Monograph (Working Paper)
Divisions: Faculty of Science and Health
Faculty of Science and Health > Psychology, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 07 May 2020 20:05
Last Modified: 06 Jan 2022 14:12
URI: http://repository.essex.ac.uk/id/eprint/27495

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