Brief foveal masking during scene perception

In the present experiment, participants were exploring line drawings of scenes in the context of an object-decision task, while eye-contingent display changes manipulated the appearance of the foveal part of the image. Foveal information was replaced by an ovoid noise mask for 83 ms, after a preset...

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Bibliographic Details
Published in:Acta psychologica 1999-03, Vol.101 (1), p.91-103
Main Authors: van Diepen, Paul M.J, Ruelens, Lieve, d’Ydewalle, Géry
Format: Article
Language:English
Subjects:
Biological and medical sciences
Eye movements
Fovea Centralis - physiology
Fundamental and applied biological sciences. Psychology
Humans
Models, Theoretical
Perception
Perceptual Masking
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Scene perception
Space life sciences
Time Factors
Vision
Visual masking
Visual Perception - physiology
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Summary:In the present experiment, participants were exploring line drawings of scenes in the context of an object-decision task, while eye-contingent display changes manipulated the appearance of the foveal part of the image. Foveal information was replaced by an ovoid noise mask for 83 ms, after a preset delay of 15, 35, 60, or 85 ms following the onset of fixations. In control conditions, a red ellipse appeared for 83 ms, centered around the fixation position, after the same delays as in the noise-mask conditions. It was found that scene exploration was hampered especially when foveal masking occurred early during fixations, replicating earlier findings. Furthermore, fixation durations were shown to increase linearly as the mask delay decreased, which validates the fixation duration as a measure of perceptual processing speed.
ISSN:0001-6918
1873-6297
DOI:10.1016/S0001-6918(98)00048-1