Reaction time (RT) measures.

<p>(A) On trials where a classification response was made, there was generally slower responding on punishment than reward trials and on trials where the non-optimal response was made; there was also a main effect of task condition, with subjects in the no-feedback condition generally responding faster than subjects in the feedback condition. (B) On trials where an avoidance response was made, there were no significant differences between reward-based and punishment-based trials, but subjects in the no-feedback condition again responded faster overall than subjects in the feedback condition.