Lecture: Adjusting behavior based on action outcomes
Goal-directed behavior requires flexible adjustments to compensatefor performance problems and changes in the environment. Theperformance monitoring system extracts information frommotivationally salient events and signals necessity, type, andmagnitude of adaptation. In my presentation I will discuss two typesof adaptation based on performance monitoring signals.In the first part, I will address trial-by-trial adjustments toaction errors, in particular top down regulation of selectiveattention enhancing task-relevant perceptual input and suppressingdistracting perceptual input. In a placebo-controlled double-blindpharmacological fMRI study we demonstrate that acetylcholine mediateserror-driven adjustments in attentional control.The second part of the presentation is dedicated to long-termadjustments based on monitored action outcome, namely learning anddecision making. In an model-based EEG analysis we compared thecortical correlates of learning from real and fictive outcomes (thelatter indicating what would have happened, had one decideddifferently). In the first 300-400 ms after feedback presentation aspatio-temporal double dissociation of processing real and fictivefeedback was found. Thereafter, cortical activity converges on acommon final pathway of adaptation reflected in a centroparietalpositivity which is predictive of future decisions.
- Werner Reichardt Centre for Integrative Neuroscience