Alba-Ferrara Lucy, Weis Susanne, Damjanovic Ljubica, Rowett Matthew, Hausmann Markus
Roskamp Laboratory of Brain Development, Modulation and Repair, Department of Psychiatry and Neurosciences, Morsani College of Medicine, University of South Florida, 3515 E Fletcher Avenue, Tampa, FL 33613, USA.
J Nerv Ment Dis. 2012 Sep;200(9):784-90. doi: 10.1097/NMD.0b013e318266f835.
Cognitive models propose that auditory verbal hallucinations arise through inner speech misidentification. However, such models cannot explain why the voices in hallucinations often have identities different from the hearer. This study investigated whether a general voice identity recognition difficulty might be present in schizophrenia and related to auditory verbal hallucinations. Twenty-five schizophrenia patients and 13 healthy controls were tested on recognition of famous voices. Signal detection theory was used to calculate perceptual sensitivity and response criterion measures. Schizophrenia patients obtained fewer hits and had lower perceptual sensitivity to detect famous voices than healthy controls did. There were no differences between groups in false alarm rate or response criterion. A symptom-based analysis demonstrated that especially those patients with auditory verbal hallucinations performed poorly in the task. The results indicate that patients with hallucinations are impaired at voice identity recognition because of decreased sensitivity, which may result in inner speech misidentification.
认知模型提出，听觉言语幻觉是通过内心言语的错误识别产生的。然而，这类模型无法解释为什么幻觉中的声音往往具有与听者不同的身份。本研究调查了精神分裂症患者是否普遍存在声音身份识别困难，以及这是否与听觉言语幻觉有关。对25名精神分裂症患者和13名健康对照者进行了著名声音识别测试。采用信号检测理论计算感知敏感性和反应标准指标。与健康对照者相比，精神分裂症患者识别出著名声音的命中次数更少，感知敏感性更低。两组在虚报率或反应标准方面没有差异。基于症状的分析表明，尤其是那些有听觉言语幻觉的患者在该任务中表现不佳。结果表明，有幻觉的患者由于敏感性降低，在声音身份识别方面存在障碍，这可能导致内心言语的错误识别。
