Although we were mostly interested in the cue phase activity, ERP responses to the target and feedback stimuli were also analyzed to investigate the possible effects of preparation on target and feedback processing. Analyses of the cue data included all trials, while analyses of the target and feedback stimuli were limited to trials with correct responses. Although it would also be interesting to look at error responses and negative feedback, we did not analyze this data. The main reason is that there are not enough error trials for a reliable ERP analysis, in particular when dissociating trials with incorrect responses from trials with correct responses that were given too late.
