Research article summary:

Self-organized pattern formation: experimental dissection of motion detection and motion integration by variation of attentional spread.

Abstract Extract:
The formation of global motion patterns depends on the stimulus activation of local motion detectors as well as integrative excitatory and/or inhibitory interactions among the activated detectors. The counterphase row-of-elements [Vis. Res. 34 (1994) ... (Full abstract text below)

Published 2002Apr in Journal: Vision Res (Language : eng)

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1. Vision Res. 2002 Apr;42(8):991-1003

Self-organized pattern formation: experimental dissection of motion detection and motion integration by variation of attentional spread.

Hock HS, Park CL, Schöner G

Department of Psychology, Florida Atlantic University, Boca Raton 33431, USA. hockhs@fau.edu

The formation of global motion patterns depends on the stimulus activation of local motion detectors as well as integrative excitatory and/or inhibitory interactions among the activated detectors. The counterphase row-of-elements [Vis. Res. 34 (1994) 1843] is an ideal stimulus for examining the relationship between the activational/energizing effect of the stimulus and interaction among the activated detectors. This is because the formation of the alternative unidirectional and oscillatory motion patterns for this stimulus requires the stimulation of local motion detectors, but there is no information in the stimulus that specifies either of the patterns. Their formation depends instead on the relative contributions of excitatory and inhibitory interactions to detector activation; the temporal patterns are self-organized. Broadly spread attention affects motion integration by changing the balance of excitatory versus inhibitory interactions, increasing the perception of unidirectional compared with oscillatory motion. (It likewise increases the perception of group compared with element motion for the Ternus stimulus.) There is, however, little if any effect of attentional spread on the luminance contrast required for the perception of single-element motion. The results indicate that the balance of integrative excitatory and/or inhibitory detector interactions can be modified by the perceiver's spread of attention, and further, that such changes need not be mediated by changes in the local, stimulus activation of the detectors.

PMID : 11934451 [PubMed - Indexed for MEDLINE]

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Full Author Information

First Name	LastName	Initials
Howard S	Hock	HS
Cynthia L	Park	CL
Gregor	Schöner	G

Affiliation: Department of Psychology, Florida Atlantic University, Boca Raton 33431, USA. hockhs@fau.edu

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Category links from this article:

Adult
Attention - physiology
Humans
Lighting
Motion Perception - physiology
Pattern Recognition, Visual - physiology
Photic Stimulation - methods

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