Science & Technology, Social Sciences, Life Sciences & Biomedicine, Ophthalmology, Psychology, Psychology, Experimental, Experimental Psychology, 1701 Psychology, 1702 Cognitive Sciences
Apparent motion stimuli often appear jerky, in particular if stimulus displacements and interstimulus intervals are large. We observed that flickering and jerkiness of a target was considerably reduced when its disappearance during the interstimulus interval was accompanied by a simultaneous change of the background. Our data show that this 'smoothness effect' is stable over a wide range of various spatiotemporal parameters. We speculate that this phenomenon occurs because the visual system attributes the irregularities in the local stimulation to global events rather than to the moving object itself.