视觉想象力强的人在闪光幻觉中看到更复杂自然的图像。
From dots to faces: Individual differences in visual imagery capacity predict the content of Ganzflicker-induced hallucinations
- 用自然语言处理分析4000+人描述，发现想象力强弱影响幻觉内容
- 强想象者报告复杂自然场景，弱想象者仅见简单几何图案
- 适合对认知神经科学与个体差异感兴趣的读者
一种快速交替的红黑闪烁刺激（Ganzflicker）可诱发视觉幻觉，反映视觉系统的生成能力。个体在视觉想象能力上存在差异，从无到极度生动不等。近期研究提出，这一想象能力谱系上的差异应也影响其他内源性视觉体验的复杂度。本研究分析了超过4,000名参与者对幻觉的自由文本描述，利用自然语言处理技术探究不同想象表型者在Ganzflicker诱导幻觉中所见内容的差异。主题建模显示，强想象者描述的内容更复杂、更接近自然场景，而弱想象者则报告简单几何图案。通过众包获取的感官运动规范数据进一步表明，强想象者使用的语言具有更丰富的感知关联。这些结果可能反映了早期视觉皮层与高级脑区之间在想象谱系上的协调差异。
原文摘要 · Abstract (English)
A rapidly alternating red and black display known as Ganzflicker induces visual hallucinations that reflect the generative capacity of the visual system. Individuals vary in their degree of visual imagery, ranging from absent to vivid imagery. Recent proposals suggest that differences in the visual system along this imagery spectrum should also influence the complexity of other internally generated visual experiences. Here, we used tools from natural language processing to analyze free-text descriptions of hallucinations from over 4,000 participants, asking whether people with different imagery phenotypes see different things in their mind's eye during Ganzflicker-induced hallucinations. Topic modeling of descriptions revealed that strong imagers described complex, naturalistic content, while weak imagers reported simple geometric patterns. Using crowd-sourced sensorimotor norms, we also found that participants with stronger imagery used language with richer perceptual associations. These findings may reflect individual variation in coordination between early visual areas and higher-order regions relevant for the imagery spectrum.
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