Effects of illusory stripes on the Helmholtz illusion.
Percept Mot Skills
; 99(2): 495-500, 2004 Oct.
Article
em En
| MEDLINE
| ID: mdl-15560337
ABSTRACT
This study examined the Helmholtz illusion by using "illusory stripes." A square patch is perceived as wider when vertical lines are drawn on it and is perceived as taller when horizontal lines are drawn on it, i.e., Helmholtz illusion. With vertical lines curved sinusoidally, horizontal "illusory stripes" are perceived; and with horizontal lines curved sinusoidally, vertical "illusory stripes" are perceived. The purpose of the present study was to test whether the "illusory stripes" produce the Helmholtz illusion. We measured the apparent size of a square patch filled with sinusoidal lines. Our subjects (N=27) judged the patch with horizontal "illusory stripes" taller than the square patch filled with vertical straight lines. The subjects also judged the square patch with vertical "illusory stripes" wider than the square patch filled with horizontal straight lines. These results demonstrate that "illusory stripes" can produce the Helmholtz illusion.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ilusões Ópticas
/
Reconhecimento Visual de Modelos
/
Percepção Visual
Limite:
Adult
/
Female
/
Humans
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article