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  1. Flicker-Light Induced Visual Phenomena: Frequency Dependence and Specificity of Whole Percepts and Percept Features.Carsten Allefeld, Peter Pütz, Kristina Kastner & Jiří Wackermann - 2011 - Consciousness and Cognition 20 (4):1344-1362.
    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 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, a set of complex percept classes (...)
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  • Bandpass Characteristics of High-Frequency Sensitivity and Visual Experience in Blindsight.Doerthe Seifert, Christine Falter, Hans Strasburger & Mark A. Elliott - 2010 - Consciousness and Cognition 19 (1):144-151.
    Patient RP suffers a unilateral right homonymous quadrant anopia but demonstrates better than chance discrimination for stimuli presented in the blind field at temporal frequencies between 33 and 47 Hz . Examination of her reports of visual experience during blind-field discrimination suggests a more complex picture in which experiences particular to correct discrimination are not found at low-mid-gamma frequencies, but are significantly more likely than average at a lower frequency at which blindsight is not observed. We believe that visual experience (...)
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