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Krause, Daniela; Jobst, Andrea; Langemak, Shari Marie; Keeser, Daniel; Chrobok, Agnieszka I.; Langgartner, Simon; Adorjan, Kristina; Gertzen, Markus; Pogarell, Oliver; Karch, Susanne (2019): Event-Related Potentials Are Associated With Unexpected Gain and Loss: Using a Gambling Paradigm. In: Clinical Eeg and Neuroscience, Vol. 50, No. 3: pp. 154-160
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Objective. Previous neuroimaging studies have described altered activity in brain areas associated with reward processing following reward or punishment. This study examines the extent to which feedback-based experience of gain and loss is associated with electrophysiological correlates. Methods. Twenty-nine healthy participants used a gambling task that focused on actual nonpredictable gains and losses. During the task, an electroencephalography recording was performed in order to assess reward processing. Event-related potentials were analyzed when participants were receiving gain/loss feedback. Results. Event-related potentials revealed higher feedback-related negativity for both overall gain and loss compared with a neutral condition in fronto-centro-parietal electrodes. P3 potentials were significantly increased for high gains/losses compared to neutral and small gains/losses. Conclusion. These results indicate that the paradigm is suitable to evoke specific patterns of reward-related electrophysiological responses. The wavelet analysis showed that electroencephalography frequency variations depended on the amount of gains/losses. Significance. This gambling paradigm is appropriate to measure aspects of feedback processing and could help analyze disease-specific alterations of the reward system in patients.