Are the Obtuse Angles the Key Components of the Poggendorff Illusion?
Keyword(s):
An experiment is reported which confirms and extends a previous finding that amputations of the Poggendorff figure do not necessarily result in large positive effects with obtuse-angle stimuli, and small or even negative effects with acute-angle stimuli. Indeed, the acute-angle effects found were significantly greater than the obtuse-angle effects, and the full Poggendorff error was not explicable in terms of the linear summation of the component-angle effects. An ‘alignment displacement effect’ reported earlier by Hotopf and Obonai was shown to occur, but could not be an important component of the Poggendorff illusion.
2018 ◽
Vol 62
(2)
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pp. 97-107
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2016 ◽
Vol 28
(3)
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pp. 123-135
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1970 ◽
Vol 17
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pp. 17-22
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2021 ◽
Vol 18
(4)
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pp. 1899
2015 ◽
Vol 115
(1)
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pp. 88-106
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