RESUMEN
17 subjects who were required to estimate the time of arrival at a target of a moving light overestimated less after alcohol treatment than after placebo.
Asunto(s)
Consumo de Bebidas Alcohólicas , Percepción de Movimiento/efectos de los fármacos , Adolescente , Adulto , Etanol/sangre , Humanos , Masculino , Persona de Mediana Edad , Percepción del Tiempo/efectos de los fármacosRESUMEN
Subjects made judgements of the comparative height of the stereokinetic cones seen for pairs of rotating figures with varying eccentricity and ellipticity. For any given eccentricity, ellipticity of the figure reduced the apparent height, with narrow ellipses seeming to be shallower. The effect is attributed to an interaction in constancy scaling.
Asunto(s)
Percepción de Movimiento , Percepción del Tamaño , Humanos , RotaciónRESUMEN
Cues affecting the apparent height (depth) of a stereokinetic 'core' were investigated by comparing heights for pairs of rotating figures. Apparent height was shown to be independent of the number of bands on the figure and of the geometric perspective by which it was drawn. On the other hand, apparent height was strongly dependent on eccentricity within the figure, with maximum apparent height being achieved at full eccentricity. The reason for the existence of such a definite maximum remains obscure.
Asunto(s)
Percepción de Profundidad , Señales (Psicología) , Percepción de Forma , Humanos , Percepción de Movimiento , Ilusiones Ópticas , RotaciónRESUMEN
It is well-known that patterns of eccentric circles when slowly rotated give rise to compelling three-dimensional impressions of cones or conical holes which can 'wobble' as the pattern rotates. The wobble can be considered as part of the overall phenomenon of depth elicited from a rotating display, the 'stereokinetic' effect (SKE). This paper considers the three-dimensional appearance as being the result of the sliding of contours and thus it imitates the motion parallax found in real three-dimensional objects in motion. New variants of SK figures are used to examine these points. An analogy with computer programs is proposed which questions earlier views on the location of perceptual invariance.