- Jastrow's duck-rabbit
- Also referred to as duck-rabbit, rabbit-duck, Jastrow's duck-rabbit illusion, and rabbit-duck illusion. The eponym Jastrow's duck-rabbit refers to the Polish-American psychologist Joseph Jastrow (1863-1944), who in 1899 published a drawing depicting an ambiguous figure that can be interpreted either as a duck or a rabbit. Jas-trow used the drawing to illustrate the notion that sense perception depends on perceptual stimuli as well as mental activity. Jastrow's duck-rabbit is designated as an ambiguous, or reversible, or bistable figure. It has been argued that it is not an " illusion proper, on the grounds that it does not operate primarily on the brain's (or mind's) unconscious inferences about the external environment, but on expectations, knowledge, and the direction of attention. Nevertheless, Jastrow's duck-rabbit tends to be classified as a "cognitive illusion, or, more specifically, an "ambiguous illusion. In the past, it has been erroneously assumed that the duck-rabbit was borrowed from a popular German weekly called Fliegende Blätter and introduced into the scientific discourse by the Austrian philosopher Ludwig Wittgenstein (1889-1951). However, Wittgenstein himself recognized Jastrow as the duck-rabbit's original creator.ReferencesBrugger, P. (1999). One hundred years of an ambiguous figure: Happy birthday, duck/ rabbit! Perceptual & Motor Skills, 89(3 Pt 1), 973977.Gregory, R.L., Gombrich, E.H., eds. (1973). Illusion in nature and art. London: Gerald Duckworth & Company.
Dictionary of Hallucinations. J.D. Blom. 2010.
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duck-rabbit — see Jastrow s duck rabbit … Dictionary of Hallucinations
duck-rabbit — The visually ambiguous figure originally used by the psychologist J. Jastrow, and published in his book Fact and Fable in Psychology (1900). The figure is discussed by Wittgenstein in the Philosophical Investigations, Pt. II, sec. xi … Philosophy dictionary
rabbit-duck — see Jastrow s duck rabbit … Dictionary of Hallucinations
rabbit-duck illusion — see Jastrow s duck rabbit … Dictionary of Hallucinations
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ambiguous illusion — Also known as ambiguous figure, ambiguity, reversible figure, and bistable figure. All five terms refer to a cognitive illusion elicited by images or objects that are capable of bringing about a perceptual switch between the alternative… … Dictionary of Hallucinations
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