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THE REGRESSION TO RIGHT ANGLES TENDENCY AND THE POGGENDORFF ILLUSION. II
Author(s) -
HOTOPF W. H. N.,
OLLEREARNSHAW CHRISTINE
Publication year - 1972
Publication title -
british journal of psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.536
H-Index - 92
eISSN - 2044-8295
pISSN - 0007-1269
DOI - 10.1111/j.2044-8295.1972.tb01284.x
Subject(s) - illusion , psychology , optical illusion , parallels , apparent size , transversal (combinatorics) , distortion (music) , geometry , cognitive psychology , mathematical analysis , mathematics , physics , mechanical engineering , amplifier , optoelectronics , cmos , engineering
The regression to right angles explanation of the Poggendorff illusion was tested by varying the distance apart of the parallels. The varying amount of illusion this produced was shown to be consistent with a constant angular distortion. When, however, the apparent angle of the transversal was also measured, this was not found to be sufficient to account for as much as half the illusion with a 30° transversal. It was shown also that the extra amount of illusion could not be accounted for by the Müller‐Lyer component of the Poggendorff illusion nor by any tendency to see the distance between the parallels as smaller than it was.