Vidal, F. 1 , Carbonnell, L. 1 , Sequeira, H. 2 & Caverni, J. 1
1 Universite de Provence, Aix-Marseille
2 Universite 2, Lille
The capacity to adjust behaviour and evaluate performance in a changing environment is highly related to taking feedback into account. The present study focused on feedback processing in hypothetico-deductive reasoning tasks. In these situations, strong response biases have been evidenced. These biases alone are insufficient to conclude that they represent errors of reasoning. Recording electrodermal activity evoked by feedback signals indicate that, when subjects displayed these response biases, the "error" feedback was unexpected, confirming that these biases represent errors of reasoning. In the same task, we analysed Event-Related Potentials evoked by the feedback signals. Depending of the recording sites, Laplacian-transformed data were sensitive, on the one hand to participants� expectancies in a binary and a gradual way and, on the other hand to the evaluation of performance itself: correct vs false. In conclusion, the processing of feedback signals depends on at least three separate processes in this kind of tasks.