Document Detail

Visual field differences for clockwise and counterclockwise mental rotation.
MedLine Citation:
PMID:  1575976     Owner:  NLM     Status:  MEDLINE    
Geometric line drawings were presented to normal subjects in the left visual field (LVF) or right visual field (RVF) at various degrees of rotation from a centrally presented vertical standard. The task of the subject was to indicate with a reaction time (RT) response whether the laterally presented stimulus could be rotated into the vertical standard or if it was a rotated mirror image of the standard. In Study 1, an overall right hemisphere superiority was found for RT and accuracy on match trials. Most interestingly, interactions between Visual Field and Rotation Angle for the match accuracy data and between Visual Field and Direction of Rotation (clockwise or counterclockwise) for the match RT slopes were found. These interactions suggested that clockwise rotations were more readily performed in the LVF and counterclockwise rotations in the RVF, consistent with other literature for mental rotation. The purpose of Study 2 was to replicate this finding of visual field differences for rotation direction using a design in which direction and degree of rotation were varied orthogonally. No main effect of Visual Field was found. However, significant interactions between Visual Field and Rotation Angle were found for both RT and accuracy, confirming the presence of visual field differences for rotation direction in a new sample of subjects. These differences were discussed in terms of the possibly greater relevance of medially directed stimuli and a possible hemispheric bias for rotation direction, and in terms of interhemispheric transmission factors.
L A Burton; N Wagner; C Lim; J Levy
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Brain and cognition     Volume:  18     ISSN:  0278-2626     ISO Abbreviation:  Brain Cogn     Publication Date:  1992 Mar 
Date Detail:
Created Date:  1992-06-11     Completed Date:  1992-06-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8218014     Medline TA:  Brain Cogn     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  192-207     Citation Subset:  IM    
Department of Neurology, Cornell University Medical College, New York Hospital, NY 10021.
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MeSH Terms
Discrimination Learning
Dominance, Cerebral*
Pattern Recognition, Visual*
Reaction Time*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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