Metacontrast with masks varying in spatial frequency and wavelength.
Vision Res
; 31(11): 2017-23, 1991.
Article
em En
| MEDLINE
| ID: mdl-1771785
ABSTRACT
In a metacontrast masking paradigm, adult subjects were required to detect briefly presented target lines followed at various delays by a flanking mask varying in spatial frequency and wavelength. Detection accuracy, the dependent measure, was recorded as a function of the delay of the mask. The results showed that long wavelength masks produced maximum masking at a relatively short delay, while short wavelength masks produced maximum masking at a relatively long delay. Results are discussed within the framework of transient/sustained (magnocellular/parvocellular) theory of visual processing, and suggest that low spatial frequency channels respond with shorter latency and/or faster rise time to short wavelength stimuli, and high spatial frequency channels respond with greater sensitivity to long wavelength stimuli.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Mascaramento Perceptivo
/
Sensibilidades de Contraste
/
Percepção de Cores
Limite:
Adult
/
Female
/
Humans
Idioma:
En
Revista:
Vision Res
Ano de publicação:
1991
Tipo de documento:
Article