感知不确定性解释了视听一致语音和麦格格尔克刺激之间的激活差异
Chenjie Dong1,2, Uta Noppeney2, Suiping Wang1
1Philosophy and Social Science Laboratory of Reading and Development in Children and Adolescents (South China Normal University), Ministry of Education, Guangzhou, China.
Human brain mapping
|March 15, 2024
概括
麦格格尔克的幻觉,即看到一个语音而听到另一个语音会产生错误的感知,是自然视听语音的有效衡量标准. 幻觉期间的大脑活动反映了感知不确定性,支持贝叶斯语音处理模型.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 心理学 心理学 心理学
背景情况:
- 面对面的沟通将听觉语言与视觉面部发音相结合.
- 麦格鲁克错觉 (听觉 /ba/ + 视觉 /ga/ 被视为 /da/) 被认为是视听语音整合的衡量标准.
- 贝叶斯框架提出,幻想和真实感知源于对杂的感官数据的概率推理.
研究的目的:
- 调查麦格古克幻觉背后的神经机制,并将其与一致的视听语音感知进行比较.
- 测试麦格鲁克幻觉感知中神经激活增加是否是由感知不确定性解释的,正如贝叶斯理论所预测的那样.
- 为了确定麦格古克的幻觉是否是自然视听语音处理的有效指标.
主要方法:
- 功能磁共振成像 (fMRI) 用于研究44名参与者的大脑活动.
- 参与者执行了一项音节分类任务,使用视听相对应的刺激,麦格鲁克和不相对应的刺激,以及单感觉刺激.
- 行为测量包括响应来量化感知不确定性.
主要成果:
- 在行为上,麦格鲁克刺激引起的响应 (不确定性) 比对应刺激更大.
- fMRI揭示了与认知控制相关的大脑区域对麦格鲁克刺激的激活增加,包括下额头 (IFS),补充前运动区域 (SMA前) 和insulae.
- 这些激活增加的统计学解释是响应的个体差异,与贝叶斯预测保持一致.
结论:
- 麦格格尔克幻觉和一致的视听语音感知共享潜在的神经机制.
- 对麦格格尔克幻觉的神经反应反映了感知不确定性,支持其作为自然视听语音处理的衡量标准的有效性.
- 这些发现支持贝叶斯理论框架,用于理解视听语音感知和幻觉.
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