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Relation between centro-parietal positivity and diffusion model parameters in both perceptual and memory-based decision making

van Vugt, M. K., Beulen, M. A. & Taatgen, N. A., 15-Jul-2019, In : Brain Research. 1715, p. 1-12 12 p.

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  • Relation between centro-parietal positivity and diffusion model parametersin both perceptual and memory-based decision making

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  • Relation between centro-parietalpositivity and diffusion model parameters in both perceptual and memory-based decision making

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DOI

Several studies have suggested that the centro-parietal positivity (CPP), an EEG potential occurring approximately 500 ms post- stimulus, reflects the accumulation of evidence for making a decision. Yet, most previous studies of the CPP focused exclusively on perceptual decisions with very simple stimuli. In this study, we examined how the dynamics of the CPP depended on the type of decision being made, and whether its slope was related to parameters of an accumulator model of decision making. We show initial evidence that memory- and perceptual decisions about carefully-controlled face stimuli exhibit similar dynamics, but offset by a time difference in decision onset. Importantly, the individual-trial slopes of the CPP are related to the accumulator model's drift parameter. These findings help to further understand the role of the CPP across different kinds of decisions.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalBrain Research
Volume1715
Early online date2019
Publication statusPublished - 15-Jul-2019

    Keywords

  • decision making, centroparietal potential, EEG, DDM, cognitive modeling, EVIDENCE ACCUMULATION, RECOGNITION, P300, CNV, REPRESENTATION, POTENTIALS, ACCURACY, CHOICE, TESTS

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