Voice identity discrimination in schizophrenia
Voice identity discrimination in schizophrenia
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DOI：
10.1016/j.neuropsychologia.2012.08.006
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发表时间：
2012-10-01
期刊：
影响因子：
2.6
通讯作者：
Leung, Doris
中科院分区：
文献类型：
--
作者：
Chhabra, Saruchi;Badcock, Johanna C.;Leung, Doris
声音提供了丰富的社会相关信息，包括说话者的身份和情感的线索。从声音中识别情感的缺陷在精神分裂症中被广泛描述，并特别与幻听（AH）有关，但相对较少注意检查分析说话者身份的能力。因此，目前的研究评估了精神分裂症患者（包括33名AH患者和32名无AH患者）与32名健康对照者之间区分不同说话者的能力。参与者对两个陌生的声音发音三音节单词的感知身份相似性的程度进行评级。多维尺度的相异性矩阵进行了解释，后验，通过相关的声学措施有关的声音身份。一个二维的知觉空间被认为是适当的精神分裂症患者和控制，轴对应于平均基频（F0）和共振峰离散度（DO。精神分裂症患者在区分声音时对F0的依赖与健康对照组没有差异，这表明精神分裂症患者使用基于音高的线索区分声音身份的能力可能相对保留。另一方面，与健康对照组相比，患者（无论是否患有AH）在辨别声音时较少使用D-f。这种扭曲的反应模式表明，精神分裂症患者在声音同一性处理方面存在一些潜在的重要差异。在健康的个体中，Forbidden离散度与对支配地位、男性气质、体型和年龄的感知有关。这些发现为未来的研究开辟了一些有趣的新方向。(C)2012爱思唯尔有限公司保留所有权利。
Voices provide a wealth of socially-relevant information, including cues to a speaker's identity and emotion. Deficits recognising emotion from voice have been extensively described in schizophrenia, and linked specifically to auditory hallucinations (AH), but relatively little attention has been given to examining the ability to analyse speaker identity. Hence, the current study assessed the ability to discriminate between different speakers in people with schizophrenia (including 33 with and 32 without AH) compared to 32 healthy controls. Participants rated the degree of perceived identity similarity of pairs of unfamiliar voices pronouncing three-syllable words. Multidimensional scaling of the dissimilarity matrices was performed and the resulting dimensions were interpreted, a posteriori, via correlations with acoustic measures relevant to voice identity. A two-dimensional perceptual space was found to be appropriate for both schizophrenia patients and controls, with axes corresponding to the average fundamental frequency (F0) and formant dispersion (DO. Patients with schizophrenia did not differ from healthy controls in their reliance on F0 in differentiating voices, suggesting that the ability to use pitch-based cues for discriminating voice identity may be relatively preserved in schizophrenia. On the other hand, patients (both with and without AH) made less use of D-f in discriminating voices compared to healthy controls. This distorted pattern of responses suggests some potentially important differences in voice identity processing in schizophrenia. Formant dispersion has been linked to perceptions of dominance, masculinity, size and age in healthy individuals. These findings open some interesting new directions for future research. (C) 2012 Elsevier Ltd. All rights reserved.