Discrimination of time intervals presented in sequences: Spatial effects with multiple auditory sources
Discrimination of time intervals presented in sequences: Spatial effects with multiple auditory sources
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DOI：
10.1016/j.humov.2007.07.009
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发表时间：
2007-10-01
影响因子：
2.1
通讯作者：
Plourde, Marilyn
中科院分区：
文献类型：
--
作者：
Grondin, Simon;Plourde, Marilyn
本文讨论了两个用简短听觉信号标记的序列来区分时间间隔的实验。参与者必须指出由四个听觉信号标记的三个间隔中的最后一个间隔是比前一个间隔短还是长。我们研究了三个基本持续时间：75、150和225毫秒。在实验1中，声音是通过耳机播放的，声音来自参与者面前的单个扬声器或四个间隔等的扬声器。在所有三种呈现模式中，在较低的基本持续时间条件下（75 ms）获得的阈值差异最大，这表明当声音呈现太快时，时间处理受损。结果还表明，在每种呈现模式中，“时间收缩效应”（即，最后一个间隔被认为比前一个间隔更短）在75毫秒时存在，而在225毫秒时则不存在。最后，使用不同的声源来标记时间并没有显著影响识别。在实验2中，来自同一源的三个信号被呈现，最后一个信号被呈现在两个位置中的一个，或近或远。当参与者在每次试验前知道声音将在哪里传递时，感知到的持续时间不受第四个信号位置的影响。然而，当参与者不确定其位置时，标记之间的距离越大，感知的持续时间就越长，这一发现仅适用于150和225毫秒。此外，感知的持续时间受到序列方向的影响（左-右vs右-左）。(c) 2007 Elsevier B.V.版权所有
This article discusses two experiments on the discrimination of time intervals presented in sequences marked by brief auditory signals. Participants had to indicate whether the last interval in a series of three intervals marked by four auditory signals was shorter or longer than the previous intervals. Three base durations were under investigation: 75, 150, and 225 ms. In Experiment 1, sounds were presented through headphones, from a single-speaker in front of the participants or by four equally spaced speakers. In all three presentation modes, the highest different threshold was obtained in the lower base duration condition (75 ms), thus indicating an impairment of temporal processing when sounds are presented too rapidly. The results also indicate the presence, in each presentation mode, of a 'time-shrinking effect' (i.e., with the last interval being perceived as briefer than the preceding ones) at 75 ms, but not at 225 ms. Lastly, using different sound sources to mark time did not significantly impair discrimination. In Experiment 2, three signals were presented from the same source, and the last signal was presented at one of two locations, either close or far. The perceived duration was not influenced by the location of the fourth signal when the participant knew before each trial where the sounds would be delivered. However, when the participant was uncertain as to its location, more space between markers resulted in longer perceived duration, a finding that applies only at 150 and 225 ms. Moreover, the perceived duration was affected by the direction of the sequences (left-right vs. right-left). (c) 2007 Elsevier B.V. All rights reserved.