The project aims to investigate whether tDCS has an effect on reward and punishment learning sensitivity. Further, whether tDCS will modulate extraversion and impulsivity personality traits, and eye-blink-rate's effect on learning. For instance, trait extroversion in past research is linked to the dopamine neurotransmitter system, where it is thought that extreme low and high levels are detrimental to cognitive performance. Since tDCS has been shown to increase dopamine levels, it is thought that people who are already high in dopamine may experience less benefit (or even impairment) on cognitive performance following tDCS.
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Change in Probabilistic Selection Task (PST) performance from pre tDCS to post tDCS
Timeframe: PST is tested prior to tDCS administration at time 0 (baseline) and following tDCS (approximately 50 minutes into the experiment) for both tDCS sham and tDCS anodal