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Titolo:
UPPER AND LOWER VISUAL-FIELD DIFFERENCES IN CATEGORICAL AND COORDINATE JUDGMENTS
Autore:
NIEBAUER CL; CHRISTMAN SD;
Indirizzi:
SAGINAW VALLEY UNIV,DEPT PSYCHOL,7400 BAY RD UNIV CTR MI 48710 UNIV TOLEDO TOLEDO OH 43606
Titolo Testata:
Psychonomic bulletin & review
fascicolo: 1, volume: 5, anno: 1998,
pagine: 147 - 151
SICI:
1069-9384(1998)5:1<147:UALVDI>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEMISPHERIC-DIFFERENCES; CEREBRAL HEMISPHERES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
C.L. Niebauer e S.D. Christman, "UPPER AND LOWER VISUAL-FIELD DIFFERENCES IN CATEGORICAL AND COORDINATE JUDGMENTS", Psychonomic bulletin & review, 5(1), 1998, pp. 147-151

Abstract

Kosslyn (1987) theorized that the left and right hemispheres differ in processing categorical and coordinate spatial relationships, respectively. Previc (1990) hypothesized that the upper and lower visual fields are functionally specialized for visual search and visuomotor manipulations, respectively. Conceptual similarities between these two theories suggested possible upper visual field advantages for categorical judgments and lower visual field advantages for coordinate judgments. In the present two experiments, subjects made either categorical or coordinate judgments to stimuli in the upper left, upper right, lower left, or lower right visual fields. The first experiment manipulated categorical/coordinate judgments as a between-subjects variable. The second experiment manipulated categorical/coordinate judgments as a within-subjects variable. In the first experiment, reaction times (RTs) for categorical judgments were equal in all visual fields except the lowerleft, in which RTs were slower. For coordinate judgments, RTs were equal in all visual fields except the lower left, in which RTs were faster. In general, these effects were replicated in the second experiment. However, there appeared to be consequences associated with manipulating the categorical/coordinate variable in a within-subjects fashion. The requirements of visual search versus visuomotor processes appear to map onto the nature of categorical versus coordinate processing, respectively, suggesting possible upper-lower visual field differences incategorical versus coordinate processing.

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Documento generato il 25/01/20 alle ore 00:23:35