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Effect of changes in fin-length on apparent shaft-length and depth in the Müller-Lyer illusion.

Authors
  • Jaeger, T
Type
Published Article
Journal
Perceptual and motor skills
Publication Date
Aug 01, 1975
Volume
41
Issue
1
Pages
79–84
Identifiers
PMID: 1178436
Source
Medline
License
Unknown

Abstract

Müller-Lyer figures with outgoing fins were back illuminated and apparent shaft-length and depth were both judged by 20 undergraduates. With the angle between the fins constant, progressive increases in fin-length produced first an increase in the apparent shaft-length and then a decrease. Changes in fin-length, however, had no significant effect on apparent depth. These data were interpreted as inconsistent with an account of the Müller-Lyer illusion in terms of perspective theory, since the latter predicts systematic changes in perceived shaft-length to be associated with systematic changes in perceived depth.

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