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Spontaneous figure reversal of ambiguous patterns was analyzed in humans. A) With Necker-"cube"-like, or "drum"-like figures, having square or round shaped "front" and "rear" surfaces, and either large or small "depth", the perceptual intervals corresponding to both interpretations of "drum" were longer than those of "cube"; the perceived "depth" of the… (More)
In this work, the results of two experiments on ambiguous patterns are reported, which have been obtained by presenting a series of stimuli designed, in both cases, to reduce gradually the ambiguity of the patterns. Such reduction has been performed by respectively increasing or decreasing the amount of graphic details in the experiments. Data of both… (More)
A permanently illuminated pattern of Mach's truncated pyramid can be perceived according to the experimental instruction given, either as a three-dimensional reversible figure with spontaneously changing convex and concave interpretation (in one experiment), or as a two-dimensional reversible figure-ground pattern (in another experiment). The reversal rate… (More)
The influence of conceptualization of a specific two-dimensional perceptual cue on the perception of the reversible Necker cube pattern was investigated. It was found that it reduced markedly the spontaneous reversal rate.