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J Exp Psychol Anim Behav Process. 1996 Jul;22(3):307-20.

Speeding up an internal clock in humans? Effects of click trains on subjective duration.

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Department of Psychology, University of Manchester, England.


Four experiments investigated the effect of trains of clicks (usually 5 s long and at 5 or 25 Hz) on subjective duration in humans, as previous research had suggested that such a manipulation would speed up the pacemaker of an internal clock by increasing participants' arousal. The four experiments used temporal generalization, pair comparison of duration, verbal estimation, and production of short durations. In all cases, preceding the durations to be judged by clicks changed their subjective length in a manner broadly consistent with the idea that pacemaker speed was increased, by an average of about 10%.

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