EFFECTS OF STIMULUS VARIABILITY ON PERCEPTION AND REPRESENTATION OF SPOKEN WORDS IN MEMORY
EFFECTS OF STIMULUS VARIABILITY ON PERCEPTION AND REPRESENTATION OF SPOKEN WORDS IN MEMORY
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DOI：
10.3758/bf03205458
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发表时间：
1995-10-01
期刊：
影响因子：
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通讯作者：
PISONI, DB
中科院分区：
文献类型：
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作者：
NYGAARD, LC;SOMMERS, MS;PISONI, DB
本研究通过一系列实验考察了刺激变异性对口语词记忆表征的影响。一系列的回忆任务被用来研究的影响，在说话的速度，谈话者的变异性，和整体幅度的初始编码，排练，并回忆的口语单词列表的变化。刺激间隔（ISI）被操纵，以确定处理的时间过程和性质。结果表明，在短ISI，洗澡说话者和说话速率的变化施加了处理成本，反映在较差的连续回忆的首要部分的单词列表。然而，在较长的ISI，说话者特征的变化导致在初始列表位置的回忆有所改善，而说话速率的变化对回忆性能没有影响。振幅变异性对所有ISI的连续回忆没有影响。总之，这些结果表明，编码的刺激尺寸，如说话者的特点，说话的速度，和整体幅度可能是不同的感知操作的结果。这些来源的刺激语音的变化的影响进行了讨论方面的知觉显着性，处理要求，和记忆表示口语的话。
A series of experiments was conducted to investigate the effects of stimulus variability on the memory representations for spoken words. A serial recall task was used to study the effects of changes in speaking rate, talker variability, and overall amplitude on the initial encoding, rehearsal, and recall of lists of spoken words. Interstimulus interval (ISI) was manipulated to determine the time course and nature of processing. The results indicated that at short ISIs, variations in bath talker and speaking rate imposed a processing cost that was reflected in poorer serial recall for the primacy portion of word lists. At longer ISIs, however, variation in talker characteristics resulted in improved recall in initial list positions, whereas variation in speaking rate had no effect on recall performance. Amplitude variability had no effect on serial recall across all ISIs. Taken together these results suggest that encoding of stimulus dimensions such as talker characteristics, speaking rate, and overall amplitude may be the result of distinct perceptual operations. The effects of these sources of stimulus variability in speech are discussed with regard to perceptual saliency, processing demands, and memory representation for spoken words.