title: The maturation of form and motion perception in school age children.
abstract: The purpose of the current study was to investigate the maturation of form and motion perception, specifically the component visual abilities involved in the identification of motion-defined form, in children ranging in age from 3 to 12 years. Experiment 1 compared the maturation of motion-defined and texture-defined shape identification. Minimum speed thresholds on the motion-defined shape task decreased until age 7 years. Orientation difference thresholds on the texture-defined shape task decreased until age 11 years. Experiment 2 compared the maturation of global motion and global texture direction discrimination. Coherence thresholds on both tasks were similar in children of all ages and adults. Experiment 3 compared the maturation of direction discrimination on motion coherence and motion displacement tasks. Maximum displacement thresholds (Dmax) increased until age 7 years. The results are discussed with respect to the maturation of M/dorsal and P/ventral visual pathways.
authors.affiliation: Department of Ophthalmology, University of British Columbia, Room A146, BC's Children's Hospital, 4480 Oak Street, Vancouver, BC, Canada V6H 3V4.
authors.forename: E E
authors.initials: EE
authors.lastname: Parrish
authors.forename: D E
authors.initials: DE
authors.lastname: Giaschi
authors.forename: C
authors.initials: C
authors.lastname: Boden
authors.forename: R
authors.initials: R
authors.lastname: Dougherty
mesh_terms: D000375:Aging / Q000523:psychology*; D002648:Child; D002675:Child, Preschool; D004192:Discrimination, Psychological / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011601:Psychophysics; D012684:Sensory Thresholds / Q000502:physiology; D014795:Visual Pathways / Q000502:physiology