Leboe Launa C, Mondor Todd A
University of Manitoba, Winnipeg, Manitoba, Canada.
Psychon Bull Rev. 2008 Dec;15(6):1122-7. doi: 10.3758/PBR.15.6.1122.
The present study investigated whether the quality of a frequency change within a sound (i.e., smooth vs. abrupt) would influence perception of its duration. In three experiments, participants were presented with two consecutive sounds on each of a series of trials, and their task was to judge whether the second sound was longer or shorter in duration than the first. In Experiment 1, participants were more likely to judge sounds consisting of a smooth and continuous change in frequency as longer in duration than sounds that maintained a constant frequency. In Experiment 2, the same bias was observed for sounds incorporating an abrupt change in frequency, but only when the frequency change was relatively small. The results of Experiment 3 suggested that the application of a change heuristic when generating duration judgments depends on the perception of change as originating from a single, integrated perceptual object.
本研究调查了声音中频率变化的质量（即平滑与突然）是否会影响对其持续时间的感知。在三个实验中，在一系列试验的每一次试验中，向参与者呈现两个连续的声音，他们的任务是判断第二个声音的持续时间比第一个声音长还是短。在实验1中，与保持恒定频率的声音相比，参与者更有可能判断由频率平滑连续变化组成的声音持续时间更长。在实验2中，对于包含频率突然变化的声音也观察到了相同的偏差，但仅当频率变化相对较小时。实验3的结果表明，在生成持续时间判断时应用变化启发式取决于将变化感知为源自单个整体感知对象。
