Contrast dependency in perceptual filling-in.
Two experiments were conducted to investigate how stimulus contrast affected the time required for perceptual filling-in. The stimuli consisted of a Gabor patch (target) and a circular grating region (surround). In Experiment 1, the target contrast was manipulated, and the surround contrast was fixed. Filling-in was significantly delayed with higher target contrast, but this delay was observed only when the target contrast exceeded the surround contrast. In Experiment 2, however, a much smaller effect of changing the surround contrast occurred. Possible reasons for this asymmetric effect are discussed.
Sakaguchi
Yutaka
Y
Human Interface Science Laboratory, Graduate School of Information Systems, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan. sakaguchi@is.uec.ac.jp
D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology*; D005364:Field Dependence-Independence; D005403:Fixation, Ocular; D006801:Humans; D009903:Optical Illusions / Q000502:physiology*; D009949:Orientation / Q000502:physiology; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time