隣接する二つの時間間隔の知覚に生じる同化現象について

摘要

When two neighboring empty time intervals are marked by three successive sounds, assimilation occurs between their perceived lengths. The aim of the present study was to examine how varying the marker durations influences the occurrence of the perceptual assimilation. In Experiment 1, participants compared the lengths of the two neighboring intervals, and in Experiment 2, the subjective length of each interval was measured. Patterns with different marker-duration combinations were used in these experiments. When the second of two successive sounds was longer, the time interval marked by the onsets of these sounds seemed to be perceived as longer also in the present paradigm.%3つの区切り苦から構成される2 つの時間間隔について，時間縮小錯覚や双方向の同化といった同化現象が存在することが知られている．区切り音の長さが同化現象にどのような影響を及ぼすのかを調べるために，各区切り音の長さを変化させたパターンについて，隣接する2 つの時間間隔を比較する実験（実験1）と，2つの時間間隔の主観的な長さを求める実験（実験2）を行った．このような文脈においても，時間間隔を構成する2 つめの区切り音の長さが長くなると，その時間間隔の過大評価が生じる可能性がみられた．