Ventriloquist illusion, the change in perceived location of an auditory stimulus when a synchronously presented but spatially discordant visual stimulus is added, has been previously shown in young healthy populations to be a robust paradigm that mainly relies on automatic processes. Here, we propose ventriloquist illusion as a potential simple test to assess audiovisual (AV) integration in young and older individuals. We used a modified version of the illusion paradigm that was adaptive, nearly bias-free, relied on binaural stimulus representation using generic head-related transfer functions (HRTFs) instead of multiple loudspeakers, and tested with synchronous and asynchronous presentation of AV stimuli (both tone and speech). The minimum audible angle (MAA), the smallest perceptible difference in angle between two sound sources, was compared with or without the visual stimuli in young and older adults with no or minimal sensory deficits. The illusion effect, measured by means of MAAs implemented with HRTFs, was observed with both synchronous and asynchronous visual stimulus, but only with tone and not speech stimulus. The patterns were similar between young and older individuals, indicating the versatility of the modified ventriloquist illusion paradigm.

中文翻译：

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虚拟声音空间线索和异步视听刺激在年轻和老年人中产生的Ventriloquist幻觉。

Ventriloquist错觉是一种听觉刺激的感知位置的变化，当添加同步呈现但空间上不一致的视觉刺激时，听觉刺激的感知位置发生了变化，先前已在年轻的健康人群中表明，Ventriloquist错觉是一种强大的范例，主要依靠自动过程。在这里，我们提出了口技迷幻术作为一种潜在的简单测试，以评估年轻人和老年人中的视听（AV）整合。我们使用了幻觉范式的修改版本，该版本具有自适应性，几乎没有偏差，使用通用的与头部相关的传递函数（HRTF）代替了多个扬声器，依赖于双耳刺激表示，并通过AV刺激的同步和异步表示进行了测试（两者均语气和言语）。最小可听角度（MAA），两个声源之间最小的可感知角度差，在没有或只有极少的感觉缺陷的青壮年和成年人中比较了有无视觉刺激。幻觉效果是通过使用HRTF实施的MAA进行测量的，在同步和异步视觉刺激下都可以观察到，但仅在语气刺激下而不在语音刺激下观察到。年轻人和老年人之间的模式相似，这表明改良的口腹幻觉幻象范式具有多功能性。