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Categorical perception of lexical tones in mandarin-speaking congenital amusics

机译：普通话说的先天性音乐中词汇声调的分类感知

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Previous research suggests that within Mandarin-speaking congenital amusics, only a subgroup has behavioral lexical tone perception impairments (tone agnosia), whereas the rest of amusics do not. The purpose of the current study was to investigate the categorical nature of lexical tone perception in Mandarin-speaking amusics with and without behavioral lexical tone deficits. Three groups of listeners (controls, pure amusics, and amusics with tone agnosia) participated in tone identification and discrimination tasks. Indexes of the categorical perception (CP) of a physical continuum of fundamental frequencies ranging from a rising to level tone were measured. Specifically, the stimulus durations were manipulated at 100 and 200 ms. For both stimulus durations, all groups exhibited similar categorical boundaries. The pure amusics showed sharp identification slopes and significantly peaked discrimination functions similar to those of normal controls. However, such essential characteristics for the CP of lexical tones were not observed in amusics with tone agnosia. An enlarged step-size from 20 to 35 Hz was not able to produce any discrimination peaks in tone agnosics either. The current study revealed that only amusics with tone agnosia showed a lack of categorical tone perception, while the pure amusics demonstrated typical CP of lexical tones, indicating that the deficit of pitch processing in music does not necessarily result in the deficit in the CP of lexical tones. The different performance between congenital amusics with and without tone agnosia provides a new perspective on the proposition of the relationship between music and speech perception.
机译：先前的研究表明，在讲普通话的先天性音乐中，只有一个亚组具有行为词汇音调知觉障碍（音调不可知性），而其余的则没有。本研究的目的是调查在有和没有行为词汇音调缺陷的情况下，汉语普通话音乐中词汇音调感知的分类性质。三组听众（控制者，纯音乐者和无语气的听者）参加了语气识别和辨别任务。测量了基本频率的物理连续统一体的分类感知（CP）指标，范围从上升到平调。具体而言，刺激持续时间在100和200毫秒处被操纵。对于这两种刺激持续时间，所有组均表现出相似的分类界限。纯音乐显示出与常规控件相似的清晰识别斜率和明显达到峰值的识别功能。但是，在音调不可知的音乐界中未观察到词汇音调CP的这种基本特征。从20 Hz扩大到35 Hz的步长大小也无法在音调不可知论中产生任何辨别峰。当前的研究表明，只有具有音调失认性的音乐人才会表现出绝对的音调感知能力，而纯音乐人却表现出典型的词汇音调CP，这表明音乐中音调处理的不足并不一定会导致词汇CP的不足。音调。先天性音乐在有无音调不可知性之间的不同表现为音乐与言语感知之间的关系提出了新的观点。

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