Development of dynamic vision based on motion contrast.
The development of dynamic vision was investigated in 400 healthy subjects (200 females and 200 males) aged between 4 and 24 years. The test consisted of a computer-generated random-dot kinematogram in which a Landolt ring was briefly presented as a form-from-motion stimulus. Motion contrast between the ring and background was varied in terms of the percentage of dots moving coherently within the ring in four levels (100%, 50%, 30%, and 20%). The subject's task was to indicate the position of a gap in the ring (left, right, top, bottom). Results show a clear increase in performance with age for all motion contrast levels, with the greatest changes for the lowest levels. Adult performance was reached at the age of 15 years. Luminance-based static acuity measured with the Landolt test was poorly correlated with acuity for its form-from-motion analogue.
Schrauf
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Institut für Physiologische Psychologie II, Heinrich-Heine-Universität Düsseldorf, Germany. schrauf@uni-duesseldorf.de
Wist
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Ehrenstein
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D000293:Adolescent; D000328:Adult; D000375:Aging / Q000502:physiology*; D002648:Child; D002657:Child Development / Q000502:physiology; D002675:Child, Preschool; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D012727:Sex Characteristics; D014792:Visual Acuity / Q000502:physiology