Abstract
Variations in stimulus parameters (distance between the parallels and angle of the transversal) in the Poggendorff illusion were used to explore possible reasons for inconsistencies in the age trends in illusion magnitude found in earlier studies. The data show that the Poggendorff illusion is very sensitive to parametric manipulations and that the age trends are quite different for different configurations of the stimulus array. Systematic sex differences in illusion magnitude were also found.
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This research represents the equal and shared contribution of both authors. It was supported in part by grants from the National Science Foundation of the United States (74-18599) and the National Research Council of Canada (A-9783).
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Girgus, J.S., Coren, S. The interaction between stimulus variations and age trends in the Poggendorff illusion. Perception & Psychophysics 41, 60–66 (1987). https://doi.org/10.3758/BF03208214
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DOI: https://doi.org/10.3758/BF03208214