原著論文
同期タッピングにおける時間情報処理
キーワード:
sensorimotor synchronization,
synchronized tapping,
negative mean asynchrony,
duration-based timing,
beat-based timing
2020 年 38 巻 2 号 p. 203-213
詳細
2020 年 38 巻 2 号 p. 203-213
When a person synchronizes finger tapping with an isochronous stimulus like a metronome, taps often precede stimuli by 100 ms or less. This phenomenon is called negative mean asynchrony (NMA). Two experiments were conducted to examine whether NMA is generated by the underestimation of inter-onset intervals (IOIs), and to examine the relation between NMA and beat-based timing. In Experiment 1, estimations of empty intervals were compared with those of filled intervals in duration and tempo tasks. Durations of empty intervals were estimated to be shorter than those of filled intervals. On the other hand, estimated tempos were the same for both empty and filled intervals. In Experiment 2, the synchronized finger-taps were compared between empty and filled intervals. NMA was observed in all conditions, but the synchronized error was greater for empty intervals than for filled intervals. These results showed that perceiving IOIs as shorter advanced the timing of taps but was not an essential factor causing taps to precede stimuli. It is considered that beat-based timing is not the cause of NMA.
