Document Detail

Holistic processes in the perception and transformation of disoriented figures.
MedLine Citation:
PMID:  6221066     Owner:  NLM     Status:  MEDLINE    
Two experiments tested whether mental rotation of complex, hierarchical stimuli occurs holistically or separately at global and local levels of structure. Large (global) letters were constructed from spatial arrangements of small (local) letters. Reflection conditions (normal vs. reflected) were produced by varying the two levels independently. The task was structured so that subjects could rotate one level of the stimulus in some conditions but had to rotate both levels in other conditions. Experiment 1 showed that rotation rate was not affected by the number of levels that had to be rotated to make a reflection decision. This result implies that the rotation of global and local levels occurred together rather than sequentially. Experiment 2 showed that the rotation of the two levels was holistic as opposed to parallel and independent. The results also demonstrate that global information is processed faster than local information regardless of whether or not a rotation is performed. These findings are discussed in relation to theories of mental rotation and global precedence.
L C Robertson; S E Palmer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of experimental psychology. Human perception and performance     Volume:  9     ISSN:  0096-1523     ISO Abbreviation:  J Exp Psychol Hum Percept Perform     Publication Date:  1983 Apr 
Date Detail:
Created Date:  1983-06-17     Completed Date:  1983-06-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7502589     Medline TA:  J Exp Psychol Hum Percept Perform     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  203-14     Citation Subset:  IM    
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MeSH Terms
Discrimination (Psychology) / physiology
Form Perception / physiology*
Orientation / physiology

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