LATERAL AND VERTICAL ATTENTIONAL BIASES IN NORMAL INDIVIDUALS

Background: When normal people attempt to bisect lines they often make their mark to the left of midline (pseudoneglect) and when attempting to bisect radial lines normal people tend to bisect distal to the actual midline. These biases might be related to asymmetrical activation induced by making sp...

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Bibliographic Details
Published in:International journal of neuroscience 2007-10, Vol.117 (10), p.1415-1424
Main Authors: DRAGO, VALERIA, FOSTER, PAUL S., WEBSTER, DANIEL G., CRUCIAN, GREGORY P., HEILMAN, KENNETH M.
Format: Article
Language:English
Subjects:
Adolescent
Adult
attention
Attention - physiology
Binomial Distribution
Female
Functional Laterality - physiology
Humans
intention
Male
Middle Aged
Perceptual Disorders - physiopathology
pseudoneglect
Reference Values
right hemisphere
Space Perception - physiology
spatial bias
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Summary:Background: When normal people attempt to bisect lines they often make their mark to the left of midline (pseudoneglect) and when attempting to bisect radial lines normal people tend to bisect distal to the actual midline. These biases might be related to asymmetrical activation induced by making spatial computations or attention-intentional preferences. The purpose of this study was to learn if in the absence of spatial computations normal subjects would demonstrate a left and upward bias. Methods: Normal subjects (139) were given 8 pegs and asked to place these pegs anywhere on a 2-foot-square board. Results: Overall, the subjects displaced the pegs to the left and upward. Conclusions: The overall left-distal bias observed in this experiment was not induced by spatial computation or misperceptions, but is consistent with the postulate that the right hemisphere is dominant for attention-intention and has a relatively distal bias.
ISSN:0020-7454
1563-5279
1543-5245
DOI:10.1080/00207450601123589