Speeding up and (…relatively…) slowing down an internal clock in humans

摘要: Two experiments used click-trains to manipulate the subjective duration of stimuli they preceded, in attempts demonstrate relative slowing down pacemaker a hypothesized internal clock. Experiment 1 pair comparison procedure, where two tones presented on each trial fact had same duration. In conditions particular interest, first tone was preceded by clicks (thus putatively timed with faster clock), other without normally). The reverse condition (no-clicks/clicks) also used. Judgements were shifted both directions (i.e. longer than second and vice versa) manipulation, consistent speeding up pacemaker. 2 popular bisection method, 200- 800-ms as Short Long standards for task. After standard presentations, subjects required classify range (from 200 800 ms 100-ms steps) terms their similarity one or standards. 'fast') 'normally'); another but not comparisons. psychophysical function obtained from procedure opposite different manipulations, 'speeding up' 'slowing down'