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Titolo:
A COMPUTER-ASSISTED TEST FOR THE ELECTROPHYSIOLOGICAL AND PSYCHOPHYSICAL MEASUREMENT OF DYNAMIC VISUAL FUNCTION-BASED ON MOTION CONTRAST
Autore:
WIST ER; EHRENSTEIN WH; SCHRAUS M;
Indirizzi:
HEINRICH HEINE UNIV,INST PHYSIOL PSYCHOL,UNIV STR 1 D-40225 DUSSELDORF GERMANY UNIV DORTMUND,INST ARBEITSPHYSIOL,ABT SINNES & NEUROPHYSIOL D-44139 DORTMUND GERMANY
Titolo Testata:
Journal of neuroscience methods
fascicolo: 1, volume: 80, anno: 1998,
pagine: 41 - 47
SICI:
0165-0270(1998)80:1<41:ACTFTE>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
RANDOM-DOT PATTERNS; DETECTABILITY; MOVEMENT; VISION; BRAIN;
Keywords:
DYNAMIC VISION; MOTION CONTRAST; FORM-FROM-MOTION; LANDOLT TEST; SCREENING TEST; NEURO-OPTHALMOLOGICAL FUNCTIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
E.R. Wist et al., "A COMPUTER-ASSISTED TEST FOR THE ELECTROPHYSIOLOGICAL AND PSYCHOPHYSICAL MEASUREMENT OF DYNAMIC VISUAL FUNCTION-BASED ON MOTION CONTRAST", Journal of neuroscience methods, 80(1), 1998, pp. 41-47

Abstract

A new test is described that allows for electrophysiological and psychophysical measurement of visual function based on motion contrast. Ina computer-generated random-dot display, completely camouflaged Landolt rings become visible only when dots within the target area are moved briefly while those of the background remain stationary. Thus, detection of contours and the location of the gap in the ring rely on motion contrast (form-from-motion) instead of luminance contrast. A standard version of this test has been used to assess visual performance in relation to age, in screening professional groups (truck drivers) and in clinical groups (glaucoma patients). Aside from this standard version, the computer program easily allows for various modifications. Theseinclude the option of a synchronizing trigger signal to allow for recording of time-locked motion-onset visual-evoked responses, the reversal of target and background motion, and the displacement of random-dottargets across stationary backgrounds. In all instances, task difficulty is manipulated by changing the percentage of moving dots within the target (or background). The present test offers a short, convenient method to probe dynamic visual functions relying on surprathreshold motion-contrast stimuli and complements other routine tests of form, contrast, depth, and color vision. (C) 1998 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/10/20 alle ore 12:57:57