Abstract
The method of production was employed to measure the Ponzo, filled space, parallel lines, and Baldwin illusions in children ranging in age from approximately 5 to approximately 10 years. The assimilative illusions (including the Ponzo) declined with age, whereas the contrast illusion increased with age. Girls tended to exhibit larger illusions than boys. It was argued that previous results on the Ponzo and Titchener circles illusions which showed an increase in illusion with age were not valid because of the use of inappropriate psychophysical methods.
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This study was supported by the National Research Council of Canada. We wish to express our appreciation to Neil Butchard for testing the subjects.
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Pressey, A.W., Wilson, A.E. Another look at age changes in geometric illusions. Bull. Psychon. Soc. 12, 333–336 (1978). https://doi.org/10.3758/BF03329699
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DOI: https://doi.org/10.3758/BF03329699