Background Sensory suppression occurs when hearing one’s self-generated voice, as opposed to passively listening to one’s own voice. Quality changes in sensory feedback to the self-generated voice can increase attentional control. These changes affect the self-other voice distinction and might lead to hearing voices in the absence of an external source (ie, auditory verbal hallucinations). However, it is unclear how changes in sensory feedback processing and attention allocation interact and how this interaction might relate to hallucination proneness (HP). Study Design Participants varying in HP self-generated (via a button-press) and passively listened to their voice that varied in emotional quality and certainty of recognition—100% neutral, 60%–40% neutral-angry, 50%–50% neutral-angry, 40%–60% neutral-angry, 100% angry, during electroencephalography (EEG) recordings. Study Results The N1 auditory evoked potential was more suppressed for self-generated than externally generated voices. Increased HP was associated with (1) an increased N1 response to the self- compared with externally generated voices, (2) a reduced N1 response for angry compared with neutral voices, and (3) a reduced N2 response to unexpected voice quality in sensory feedback (60%–40% neutral-angry) compared with neutral voices. Conclusions The current study highlights an association between increased HP and systematic changes in the emotional quality and certainty in sensory feedback processing (N1) and attentional control (N2) in self-voice production in a nonclinical population. Considering that voice hearers also display these changes, these findings support the continuum hypothesis.

中文翻译：

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幻觉倾向改变了自我声音生产中的感觉反馈处理


背景 当听到一个人自己产生的声音时，就会发生感觉抑制，而不是被动地倾听自己的声音。对自生声音的感官反馈的质量变化可以提高注意力控制。这些变化会影响自我-他人声音的区分，并可能导致在没有外部来源的情况下听到声音（即，听觉性言语幻觉）。然而，目前尚不清楚感觉反馈处理和注意力分配的变化如何相互作用，以及这种相互作用如何与幻觉倾向 （HP） 相关。研究设计 在脑电图 （EEG） 记录期间，参与者的 HP 自生成（通过按下按钮）和被动倾听他们的声音，这些声音在情绪质量和识别确定性方面各不相同——100% 中性，60%-40% 中性愤怒，50%-50% 中性愤怒，40%-60% 中性愤怒，100% 愤怒。研究结果 N1 听觉诱发电位对于自生成的声音比外部产生的声音更受抑制。HP 增加与 （1） 与外部生成的声音相比，对自我的 N1 反应增加，（2） 与中性声音相比，对愤怒的 N1 反应减少，以及 （3） 与中性声音相比，N2 对感官反馈中意外声音质量的反应减少（60%-40% 中性愤怒）。结论 目前的研究强调了 HP 的增加与非临床人群中自我声音产生的感觉反馈处理 （N1） 和注意力控制 （N2） 的情绪质量和确定性的系统变化之间的关联。考虑到语音听众也表现出这些变化，这些发现支持连续体假说。