title: Shape-assimilation effect: retrospective distortion of visual shapes.
abstract: A brief visual stimulus distorts the perceived shape of a subsequent visual stimulus as being dissimilar to the shape of a previous stimulus (shape-contrast effect). In this study, we presented a visual stimulus after a to-be-estimated target stimulus and found that the perceived shape of the target stimulus appeared to be similar to the shape of the following stimulus (shape-assimilation effect). The assimilation effect occurred even when the following stimulus was presented at positions different from that of the target stimulus, indicating that the shape-assimilation effect is a nonretinotopic distortion. The results suggest that the preceding and succeeding stimuli differentially modulate the perceived shape of a briefly presented stimulus.
authors.affiliation: Yamaguchi University, Yamaguchi, Japan, fuminori@yamaguchi-u.ac.jp.
authors.forename: Fuminori
authors.initials: F
authors.lastname: Ono
authors.forename: Katsumi
authors.initials: K
authors.lastname: Watanabe
mesh_terms: D000704:Analysis of Variance; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D005795:Generalization, Stimulus / Q000502:physiology; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D009903:Optical Illusions / Q000502:physiology*; D010469:Perceptual Distortion / Q000502:physiology*; D015203:Reproducibility of Results; D012107:Research Design; D012189:Retrospective Studies; D014584:User-Computer Interface; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult