Poster A110, Saturday, March 25, 5:00 – 7:00 pm, Pacific Concourse
Have a little faith in … your predictions: The development of confidence with proficiency in a time-estimation task - insights from feedback-related brain potentials
Romy Frömer1, Werner Sommer1, Birgit Stürmer2, Nick Yeung3; 1Humboldt-Universität zu Berlin, 2International Psychoanalytic University, 3University of Oxford
Learning improves both, performance and the ability to predict the outcome of a given action. Feedback is crucial for the development of the internal models underlying these functions. As the nervous system is noisy, inevitably, errors in response production occur that can be detected based on predictions of the forward model. With learning, confidence in these predictions increases and should affect how feedback is processed. We propose that differences in confidence in the forward model’s prediction underlie commonly observed dissociations of confidence and performance, e.g. as a function of personality differences along the neuroticism continuum. In a time estimation task with continuous performance feedback, we distinguished standard reward prediction errors (RPE), indexing outcome valence with regard to the goal and valence-free output prediction errors (OPE), indicating mismatch between prediction of the forward model and actual performance. As we expected, confidence increased with learning and differentiated increasingly well between accurate and inaccurate predictions. Model mismatch, indexed by OPE, and confidence jointly enhanced P3a amplitude to feedback. Expected individual differences were observed in confidence development with regard to performance, and outcome evaluation indexed by the feedback-related negativity (FRN). Low-neuroticism individuals showed larger confidence gains with increasing proficiency, and larger confidence and OPE effects on FRN in addition to RPE. This indicates more cognitive processing of feedback in low-neuroticism individuals, compared to affective processing in high neuroticism individuals. We conclude that confidence affects model evaluation and may enhance feedback salience, reflected in FRN amplitude in some individuals.
Topic Area: PERCEPTION & ACTION: Motor control