Damien Gabriel

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Julian Kiverstein

Academic Medical Centre/ Universiteit van Amsterdam

David Seamon

Kansas State University

Erik Myin

University of Antwerp

Roberto Horácio Sá Pereira

Universidade Federal do Rio de Janeiro (UFRJ)

Adam Pautz

Brown University

Simon Cropper

University of Melbourne

Darrell M Hull

University of North Texas

Donizeti Honorato

Universidade Estadual de Campinas

Giovane Sousa

Harvard Medical School

Dániel Bereczki

Semmelweis University

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Papers by Damien Gabriel

The processing of emotional utterances: Roles of prosodic and lexical information

!e present study investigates the interaction between prosodic and lexical information in express... more !e present study investigates the interaction between prosodic and lexical information in expressing and recognising emotional states in the encoding and decoding of speech. !e study deals with the processing of interjections in English and is based on previous studies using German data (Dietrich et al., 2006), where it was found that listeners classify interjections into two categories with respect to lexical ambiguity. In the current investigation, behavioural data indicate that interjections can be classified into the two major categories: interjections with low or high lexical information. High lexical information has been demonstrated to facilitate recognition of emotion due to the redundancy in the prosodic and lexical information, e.g. yuk can only be classified as disgust. Items with low lexical content in contrast are ambiguous and may be used to express different emotions, e.g. a single–vowel like /a/ may express happiness, surprise, or anger. !e intended meaning and its c...

Neural Correlates of Successful and Unsuccessful Strategical Mechanisms Involved in Uncertain Decision-Making

PLOS ONE, 2015

The ability to develop successful long-term strategies in uncertain situations relies on complex ... more The ability to develop successful long-term strategies in uncertain situations relies on complex neural mechanisms. Although lesion studies have shown some of the mechanisms involved, it is still unknown why some healthy subjects are able to make the right decision whereas others are not. The aim of our study was to investigate neurophysiological differences underlying this ability to develop a successful strategy in a group of healthy subjects playing a monetary card game called the Iowa Gambling Task (IGT). In this task, subjects have to win and earn money by choosing between four decks of cards, two were advantageous in the long term and two disadvantageous. Twenty healthy right-handed subjects performed the IGT while their cerebral activity was recorded by electroencephalography. Based on their behavioral performances, two groups of subjects could clearly be distinguished: one who selected the good decks and thus succeeded in developing a Favorable strategy (9 subjects) and one who remained Undecided (11 subjects). No neural difference was found between each group before the selection of a deck, but in both groups a greater negativity was found emerging from the right superior frontal gyrus 600 ms before a disadvantageous selection. During the processing of the feedback, an attenuation of the P200 and P300 waveforms was found for the Undecided group, and a P300 originating from the medial frontal gyrus was found in response to a loss only in the Favorable group. Our results suggest that undecided subjects are hyposensitive to the valence of the cards during gambling, which affects the feedback processing.

Damien Gabriel

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