Introduction
In a recent comprehensive review of discrimination without awareness, Eriksen2 has concluded from the literature and from the results of his own work, that autonomic and verbal responses are "at least partially parallel response systems both independently responding to the perceptual process." Although this conclusion has attracted much recent interest, it remains true that the 2 response systems are considerably interrelated. Along with other authors, we1 have described the "response-effect" phenomenon, in which the verbal identifications of the subject systematically influence the magnitude of autonomic response. However, the converse, i.e., the effect of autonomic response upon verbal behavior, has been little investigated in studies in which the verbal behavior is associated with the identification of, or the description of, subliminal stimuli. We have encountered what we believe may be such a manifestation, namely an effect of autonomic excitation upon an aspect of