Journal article
Authors list: Franz, V; Gegenfurtner, K
Publication year: 2008
Pages: 920-950
Journal: Cognitive Neuropsychology
Volume number: 25
Issue number: 7-8
ISSN: 0264-3294
eISSN: 1464-0627
DOI Link: https://doi.org/10.1080/02643290701862449
Publisher: Taylor and Francis Group
Abstract:
The finding that the Ebbinghaus/Titchener illusion deceives perception but not grasping is usually seen as strong evidence for Goodale and Milner's (1992) notion of two parallel visual systems, one being conscious and deceived by the illusion (vision-for-perception) and the other being unconscious and not deceived (vision-for-action). However, this finding is controversial and led to studies with seemingly contradictory results. We argue that these results are not as contradictory as it might seem. Instead, studies consistently show similar effects of the illusion on grasping. The perceptual effects are strongly dependent on the specific perceptual measure employed. If, however, some methodological precautions are used, then these diverse perceptual results can be reconciled and point to a single internal size estimate that is used for perception and for grasping. This suggests that the Ebbinghaus illusion deceives a common representation of object size that is used by perception and action.
Citation Styles
Harvard Citation style: Franz, V. and Gegenfurtner, K. (2008) Grasping visual illusions: Consistent data and no dissociation, Cognitive Neuropsychology, 25(7-8), pp. 920-950. https://doi.org/10.1080/02643290701862449
APA Citation style: Franz, V., & Gegenfurtner, K. (2008). Grasping visual illusions: Consistent data and no dissociation. Cognitive Neuropsychology. 25(7-8), 920-950. https://doi.org/10.1080/02643290701862449