title: Sensitivity to first- and second-order motion and form in children and adults.
abstract: We compared the sensitivity of adults and children aged 3-10 years to first- and second-order motion and form. For first-order stimuli, at all ages sensitivity was better for motion than form, and motion thresholds were better at 6 Hz than at 1.5 Hz. For second-order stimuli, at all ages sensitivity was better for form than motion, and motion thresholds were better at 0.25 cyc/deg than at 1 cyc/deg. Thresholds became adult-like later for motion than for form and later for first-order than second-order stimuli. For first-order stimuli, the changes with age were larger and more protracted.
authors.affiliation: Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada L8S 4K1.
authors.forename: Vickie
authors.initials: V
authors.lastname: Armstrong
authors.forename: Daphne
authors.initials: D
authors.lastname: Maurer
authors.forename: Terri L
authors.initials: TL
authors.lastname: Lewis
mesh_terms: D000293:Adolescent; D000375:Aging / Q000502:physiology / Q000523:psychology*; D002648:Child; D002675:Child, Preschool; D015350:Contrast Sensitivity / Q000502:physiology; D003463:Cues; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011601:Psychophysics; D012684:Sensory Thresholds / Q000502:physiology; D055815:Young Adult