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Psychological Research
Gepubliceerd in:

01-07-2015 | Original Article

Garner-Interference in left-handed awkward grasping

Auteurs: Owino Eloka, Felix Feuerhake, Markus Janczyk, Volker H. Franz

Gepubliceerd in: Psychological Research | Uitgave 4/2015

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Abstract

The Perception–Action Model (PAM) claims to provide a coherent interpretation of data from all areas of the visual neurosciences, most notably data from neuropsychological patients and from behavioral experiments in healthy people. Here, we tested two claims that are part of the core version of the PAM: (a) certain actions (natural, highly practiced, and right-handed) are controlled by the dorsal vision for action pathway, while other actions (awkward, unpracticed, or left-handed) are controlled by the ventral vision for perception pathway. (b) Only the dorsal pathway operates in an analytical fashion, being able to selectively focus on the task-relevant dimension of an object (Ganel and Goodale, Nature 426(6967):664–667, 2003). We show that one of these claims must be wrong: using the same test for analytical processing as Ganel and Goodale (2003), we found that even an action that should clearly be ventral (left-handed awkward grasping) shows analytical processing just as a dorsal task does (right-handed natural precision grasping). These results are at odds with the PAM and point to an inconsistency of the model.
vorige artikel Individual differences in fluid intelligence predicts inattentional blindness in a sample of older adults: a preliminary study
volgende artikel The contribution of verbalization to action
Voetnoten
1
Such reasoning is also implicitly assumed in studies using visual illusions. If, for instance, participants are asked to grasp the target circle of an Ebbinghaus illusion, the PAM says that vision for action determines the size of the target circle without being influenced by the neighboring context circles. If, however, participants are asked to manually estimate the size of the target circle, the PAM states that vision for perception codes the size of the target circle relative to the neighboring context circles.
 
2
Note that in the original work this was even claimed true for left-handers.
 
3
Time to complete movement was the prominent dependent variable in the original study (Ganel & Goodale, 2003). For that reason, results for time to complete movement will always be presented first. Note that in the original study this variable was refered to as “reaction time to complete movement”.
 
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Metagegevens
Titel
Garner-Interference in left-handed awkward grasping
Auteurs
Owino Eloka
Felix Feuerhake
Markus Janczyk
Volker H. Franz
Publicatiedatum
01-07-2015
Uitgeverij
Springer Berlin Heidelberg
Gepubliceerd in
Psychological Research / Uitgave 4/2015
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-014-0585-1

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