Universidad Complutense de Madrid
E-Prints Complutense

Comparing the effect of the interaction between fine and coarse scales and surround suppression on motion discrimination.

Impacto

Descargas

Último año

Serrano Pedraza, Ignacio y Gamonoso Cruz, María J y Sierra Vázquez, Vicente y Derrington, Andrew M (2013) Comparing the effect of the interaction between fine and coarse scales and surround suppression on motion discrimination. Journal of vision, 13 (11). ISSN 1534-7362

[img]
Vista previa
PDF
Creative Commons License
Esta obra está bajo una licencia de Creative Commons: Reconocimiento - No comercial - Sin obra derivada.

906kB

URL Oficial: http://dx.doi.org/10.1167/13.11.5



Resumen

Our ability to discriminate motion direction in a Gabor patch diminishes with increasing size and contrast, indicating surround suppression. Discrimination is also impaired by a static low-spatial-frequency patch added to the moving stimulus, suggesting an antagonism between sensors tuned to fine and coarse features. Using Bayesian staircases, we measured duration thresholds in motion-direction discrimination tasks using vertically oriented Gabor patches moving at 2°/s. In two experiments, we tested two contrasts (2.8% and 46%), five window sizes (from 0.7° to 5°), and two spatial frequencies (1 c/deg and 3 c/deg), either presented alone or added to a static pattern. When the moving pattern was presented alone, duration thresholds increased with size at high contrast and decreased with size at low contrast. At low contrast, when a static pattern of 3 c/deg was added to a moving pattern of 1 c/deg, duration thresholds were similar to the case when the moving pattern was presented alone; however, at high contrast, duration thresholds were facilitated, eliminating the effect of surround suppression. When a static pattern of 1 c/deg was added to a moving pattern of 3 c/deg, duration thresholds increased about 4 times for high contrast and 2 times for low contrast. These results show that the antagonism between sensors tuned to fine and coarse scales is more complex than surround suppression, suggesting that it reflects the operation of a different mechanism.


Tipo de documento:Artículo
Palabras clave:Motion discrimination, Surround suppression, Interaction between motion sensors, Motion impairments, Inhibition
Materias:Ciencias Biomédicas > Psicología > Psicología experimental
Ciencias Biomédicas > Psicología > Percepción
Ciencias Biomédicas > Óptica y optometría > Óptica oftálmica
Código ID:36274
Depositado:20 Abr 2016 12:03
Última Modificación:20 Abr 2016 15:15

Descargas en el último año

Sólo personal del repositorio: página de control del artículo