Grasping visual illusions: Consistent data and no dissociation
نویسندگان
چکیده
منابع مشابه
Grasping visual illusions: Consistent data and no dissociation.
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 wi...
متن کاملGrasping visual illusions: no evidence for a dissociation between perception and action.
Neuropsychological studies prompted the theory that the primate visual system might be organized into two parallel pathways, one for conscious perception and one for guiding action. Supporting evidence in healthy subjects seemed to come from a dissociation in visual illusions: In previous studies, the Ebbinghaus (or Titchener) illusion deceived perceptual judgments of size, but only marginally ...
متن کاملVisual illusions, delayed grasping, and memory: no shift from dorsal to ventral control.
We tested whether a delay between stimulus presentation and grasping leads to a shift from dorsal to ventral control of the movement, as suggested by the perception-action theory of Milner and Goodale (Milner, A.D., & Goodale, M.A. (1995). The visual brain in action. Oxford: Oxford University Press.). In this theory the dorsal cortical stream has a short memory, such that after a few seconds th...
متن کاملDissociating size representation for action and for conscious judgment: Grasping visual illusions without apparent obstacles.
Visual illusions provide important evidence for the co-existence of unconscious and conscious representations. Objects surrounded by other figures (e.g., a disc surrounded by smaller or larger rings, Ebbinghaus/Titchener illusion) are consciously perceived as different in size, while the visuo-motor system supposedly uses an unconscious representation of the discs' true size for grip size scali...
متن کاملThe functional subdivision of the visual brain: Is there a real illusion effect on action? A multi-lab replication study.
It has often been suggested that visual illusions affect perception but not actions such as grasping, as predicted by the "two-visual-systems" hypothesis of Milner and Goodale (1995, The Visual Brain in Action, Oxford University press). However, at least for the Ebbinghaus illusion, relevant studies seem to reveal a consistent illusion effect on grasping (Franz & Gegenfurtner, 2008. Grasping vi...
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ژورنال
عنوان ژورنال: Cognitive Neuropsychology
سال: 2008
ISSN: 0264-3294,1464-0627
DOI: 10.1080/02643290701862449