We focused on the contrast of rewards versus their absence. Thus, we can only generalize to these two types of feedback. All the other published work on oscillatory EEG feedback processing has included reward versus loss. While ERP studies suggest that outcomes worse than expected that are loss or no-win evoke comparable FRNs (Hajcak, Moser, Holroyd, & Simons, 2006; Holroyd, Hajcak, & Larsen, 2006), we do not assume this to be true at the level of oscillatory activity. As well, our use of a chance-based task limits generalization of our findings to this type of task. Future work might examine EEG oscillations in learning feedback tasks, which may be able to speak to which aspects of oscillatory activity relate to learning rate across development.
