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 results imply that there is a defect in the mediation output

 systems, such that behaviorally the patient responds, but

 without the corresponding subjective experience of emotion.

 Due to the inability in directly measuring subjective

 experience, the ability to interpret discordance in response

 systems is weakened. To illustrate, two groups, A and B,

 are investigated during emotion-eliciting experiences. Both

 A and B verbally report experiencing emotion. However,

 group A does not exhibit psychophysiological measures

 indicative of emotion. Are the subjective emotional

 experiences of group A and B different? There are two

 possible interpretations: (1) they are experiencing

 qualitatively different emotional experiences, such that

 group A's experience of emotion is more "cognitive" than

 group B's experience, or (2) they are experiencing the same

 emotional experiences, but group A has a problem with the

 feedforward system of emotional psychophysiological

 responding. Because interpretation includes inferences

about subjective experiences, neither interpretation can be

proven correct or rejected as invalid. It is unclear, at

this time, how patients with unilateral damage experience

emotion based on the interaction of these three response

systems. Specifically, it is unknown whether unilateral

lesions would produce concordance or discordance of

emotional experience.