Flicker-light induced visual phenomena: Frequency dependence and specificity of whole percepts and percept features
Flicker-light induced visual phenomena: Frequency dependence and specificity of whole percepts and percept features
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DOI：
10.1016/j.concog.2010.10.026
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发表时间：
2011-12-01
影响因子：
2.4
通讯作者：
Wackermann, Jiri
中科院分区：
文献类型：
--
作者：
Allefeld, Carsten;Puetz, Peter;Wackermann, Jiri
闪烁的光线会引起人类观察者的视觉幻觉。尽管历史悠久的现象，闪烁引起的主观印象的依赖闪烁频率知之甚少。我们调查这个问题，使用Ganzfeld刺激和实验范式相结合的连续频率扫描（1-50赫兹），重点是重新发生，整个感知。在单主体水平上，我们发现感知的频率稳定性很高。为了在受试者之间进行概括，我们应用两个评级系统，（1）一组来自受试者报告的复杂感知类和（2）基本感知特征的枚举，并确定闪烁频率上的发生分布。我们观察到一个更强的频率特异性复杂的类比基本的类特征。比较的相似性关系的感知类别之间的频率配置文件，我们观察到，虽然感知优先诱导特定的频率，频率并不明确地确定经验丰富的感知。(C)2010年爱思唯尔公司All rights reserved.
Flickering light induces visual hallucinations in human observers. Despite a long history of the phenomenon, little is known about the dependence of flicker-induced subjective impressions on the flicker frequency. We investigate this question using Ganzfeld stimulation and an experimental paradigm combining a continuous frequency scan (1-50 Hz) with a focus on re-occurring, whole percepts. On the single-subject level, we find a high degree of frequency stability of percepts. To generalize across subjects, we apply two rating systems, (1) a set of complex percept classes derived from subjects' reports and (2) an enumeration of elementary percept features, and determine distributions of occurrences over flicker frequency. We observe a stronger frequency specificity for complex percept classes than elementary percept features. Comparing the similarity relations among percept categories to those among frequency profiles, we observe that though percepts are preferentially induced by particular frequencies, the frequency does not unambiguously determine the experienced percept. (C) 2010 Elsevier Inc. All rights reserved.