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Results for “FIGURAL AFTEREFFECT”

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At least 847 records · Page 47Linked to original sources
PubMed1983

Palinopsia: rare but ominous symptom of cerebral dysfunction.

A 66-year-old man experienced palinopsia (visual perseveration) that lasted for several minutes. A malignant glioma of the right occipital lobe was demonstrated radiologically and histologically. The lesions that can give rise to this phenomenon are usually neoplasms and vascular disorders. This symptom can be confused with hysteria or psychosis, especially when no objective clinical findings are demonstrable. The mechanism of this symptom is still obscure.

Aged↗
PubMed1977

A technique for evaluating the stability of figures in a figure-ground pattern.

A technique is described which uses a reversible word-figure for studying effects of experimental variables on the stability of figures. In a reversible word-figure black on white inter-letter spaces represent "nonsense" forms which are usually perceived first. In this study the latency of reversal to the white on black word-configuration is taken as an index of the stability of the perceptual construction involving the black nonsense forms. The results show that pre-exposure of the nonsense forms increases their stability. Either labelling the forms or attempting to memorize them increases stability somewhat more than merely rating them for "aesthetic appeal."

Discrimination, Psychological↗
PubMed1980

Relationship between perceptual stability, and sighting dominance.

A study was made of perceptual stability (in binocular, right and left monocular vision) and sighting dominance. 47 female psychology students served as subjects. The intention was to verify: (1) the hypothesis of asymmetry between the two eyes in the duration of the retinal image, which is indicative of sensory dominance; (2) the existence of a relationship between the two forms of dominance. The results seem to confirm the first hypothesis. Other relationships between sighting dominance and stability of image emerged. There was a positive correlation between sighting dominance and perceptual stability in binocular vision. There appear to be significant differences in perceptual stability depending on whether subjects show right, left, or no dominance.

Adult↗