1. Taking it easy when playing ultimatum game with a Down syndrome proposer: Effects on behavior and medial frontal negativity
- Author
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Julia Horta Tabosa do Egito, Paulo S. Boggio, Camila Campanhã, and Gabriel Gaudencio Rêgo
- Subjects
Adult ,Male ,Down syndrome ,Medial frontal negativity ,Adolescent ,Social Psychology ,media_common.quotation_subject ,Development ,050105 experimental psychology ,Young Adult ,03 medical and health sciences ,Behavioral Neuroscience ,0302 clinical medicine ,Perception ,medicine ,Humans ,Interpersonal Relations ,0501 psychology and cognitive sciences ,Social Behavior ,Evoked Potentials ,media_common ,Analysis of Variance ,Ultimatum game ,05 social sciences ,Brain ,Electroencephalography ,P300 amplitude ,medicine.disease ,Games, Experimental ,Behavioral data ,Female ,Down Syndrome ,Psychology ,Social psychology ,030217 neurology & neurosurgery - Abstract
The ultimatum game (UG) is an endowment sharing game in which a proposer suggests a division of an asset to a recipient, who must accept or reject it. Economic studies showed that despite recipients usually rejecting unfair offers, perception and reaction to unfairness are highly dependent on who is the proposer. Event-related potentials (ERPs) commonly detected in UG games are the medial frontal negativity (MFN), a component detected in recipients facing unfair offers, and the P300, a component related to attentional and memory processes. Given this, we aimed to investigate the behavioral and ERP responses of healthy people playing the UG game with Down syndrome (DS) and typical development (TD) proposers. Nineteen subjects participated in this study. The UG behavioral data were similar to previous studies. ERP analysis showed no MFN in participants facing unfair offers. A higher P300 amplitude was detected when participants faced fair offers from TD compared to DS fair offers. We also found a positive correlation between P300 amplitude for TD offers and self-esteem scale score. Together these findings indicate that insertion of an atypical player in the UG led to changes in participants' perception and expectancy of the game.
- Published
- 2016
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