The author suggests that repetition of a stimulus will enhance responding. This is true only when the stimulus is extremely noxious. As generally presented, the DLCQ, should be rather innocuous, and certainly no more noxious than a standard control questions. The general principle in psychology and psychophysiology is that physiological responding decreases with stimulus repetition. This process is known as habituation.
Habituation is probably the most well know and accepted of the psychophysiological processes.
Since there was no possibility for habituation of the DLCQ in this study, the procedure of extrapolating one presentation of the DLCQ to what may have occurred if it had been presented many times is dangerous and almost certainly overestimates an effect that is already likely to be inflated by orienting and dishabituation processes. The author closes with strong inferential statements that are not justified by the results. The author makes these strong inferential statements on the basis of a study of 10 subjects. Strong inferential statements are almost never justified on the basis of a study of such low statistical power. These statements are especially exaggerated in the light of the points raised above that suggest alternative explanations.