Cite as:
Mapperson B, Lovegrove W, 1983, "Instability in triangular-wave gratings: a role for perceptual inferences?" Perception 12(5) 545 – 548
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Instability in triangular-wave gratings: a role for perceptual inferences?

Barry Mapperson, William Lovegrove

Received 2 November 1982, in revised form 12 May 1983

Abstract. Recently it has been reported that a grating with a triangular-wave luminance profile may fluctuate between being perceived veridically, and as a percept which more closely resembles a square wave, and is itself bistable. Several additional percepts which may be experienced are reported. It is also noted that the relative dominance of two of these percepts can be altered by either physically present or inferred cues as to the probable direction of illumination. It is suggested that these observations implicate higher-level processes in this new form of perceptual instability.

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