Biomaterial Database

Visual apparent movement: transformations of size and orientation. 1983

C Bundesen, and A Larsen, and J E Farrell

Sequential alternation between same-shaped stimuli differing in size (size ratio s) and orientation (angular difference v) produced a visual illusion of translation in depth and concurrent rotation. The minimum stimulus-onset asynchrony required for the appearance of a rigidly moving object was approximately a linearly increasing function of (s-1)/(s+1) for simple translation in depth and a linearly increasing function of v for simple rotation. The extrapolated zero intercept was lower for translation than for rotation, but estimated transformation times were additive in combined transformations. The results suggest that (a) the processes of apparent translation in depth and apparent rotation are individually sequential-additive in structure, and (b) apparent translations and rotations are combined by fine-grained alternation of steps of apparent translation and steps of apparent rotation. Similar principles account for recent data on imagined spatial transformations of visual size and orientation.

UI	MeSH Term	Description	Entries
D007088	Illusions	The misinterpretation of a real external, sensory experience.	Autokinetic Effect,Autokinetic Illusions,Effect, Autokinetic,Illusions, Auditory,Illusions, Kinesthetic,Illusions, Tactile,Illusions, Visual,Auditory Illusion,Auditory Illusions,Autokinetic Effects,Autokinetic Illusion,Effects, Autokinetic,Illusion,Illusion, Auditory,Illusion, Autokinetic,Illusion, Kinesthetic,Illusion, Tactile,Illusion, Visual,Illusions, Autokinetic,Kinesthetic Illusion,Kinesthetic Illusions,Tactile Illusion,Tactile Illusions,Visual Illusion,Visual Illusions
D009039	Motion Perception	The real or apparent movement of objects through the visual field.	Movement Perception,Perception, Motion,Perception, Movement
D009903	Optical Illusions	An illusion of vision usually affecting spatial relations.	Illusion, Optical,Illusions, Optical,Optical Illusion
D009949	Orientation	Awareness of oneself in relation to time, place and person.	Cognitive Orientation,Mental Orientation,Psychological Orientation,Cognitive Orientations,Mental Orientations,Orientation, Cognitive,Orientation, Mental,Orientation, Psychological,Orientations,Orientations, Cognitive,Orientations, Mental,Orientations, Psychological,Psychological Orientations
D011601	Psychophysics	The science dealing with the correlation of the physical characteristics of a stimulus, e.g., frequency or intensity, with the response to the stimulus, in order to assess the psychologic factors involved in the relationship.	Psychophysic
D003867	Depth Perception	Perception of three-dimensionality.	Stereopsis,Stereoscopic Vision,Depth Perceptions,Perception, Depth,Perceptions, Depth,Stereopses,Stereoscopic Visions,Vision, Stereoscopic,Visions, Stereoscopic
D004193	Discrimination Learning	Learning that is manifested in the ability to respond differentially to various stimuli.	Discriminative Learning,Discrimination Learnings,Discriminative Learnings,Learning, Discrimination,Learning, Discriminative
D005556	Form Perception	The sensory discrimination of a pattern, shape, or outline.	Contour Perception,Contour Perceptions,Form Perceptions,Perception, Contour,Perception, Form,Perceptions, Contour,Perceptions, Form
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012684	Sensory Thresholds	The minimum amount of stimulus energy necessary to elicit a sensory response.	Sensory Threshold,Threshold, Sensory,Thresholds, Sensory