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Price, Kelly J.; Shiffrar, Maggie; Kerns, Kimberly A. – Research in Autism Spectrum Disorders, 2012
To determine whether motor difficulties documented in Asperger's Syndrome (AS) are related to compromised visual abilities, this study examined perception and movement in response to dynamic visual environments. Fourteen males with AS and 16 controls aged 7-23 completed measures of motor skills, postural response to optic flow, and visual…
Descriptors: Optics, Motion, Motor Development, Asperger Syndrome
Loula, Fani; Prasad, Sapna; Harber, Kent; Shiffrar, Maggie – Journal of Experimental Psychology: Human Perception and Performance, 2005
Human observers demonstrate impressive visual sensitivity to human movement. What defines this sensitivity? If motor experience influences the visual analysis of action, then observers should be most sensitive to their own movements. If view-dependent visual experience determines visual sensitivity to human movement, then observers should be most…
Descriptors: Cues, Visual Perception, Recognition (Psychology), Motion
Jacobs, Alissa; Pinto, Jeannine; Shiffrar, Maggie – Journal of Experimental Psychology: Human Perception and Performance, 2004
Why are human observers particularly sensitive to human movement? Seven experiments examined the roles of visual experience and motor processes in human movement perception by comparing visual sensitivities to point-light displays of familiar, unusual, and impossible gaits across gait-speed and identity discrimination tasks. In both tasks, visual…
Descriptors: Visual Perception, Motion, Visual Stimuli, Visual Discrimination
Jacobs, Alissa; Shiffrar, Maggie – Journal of Experimental Psychology: Human Perception and Performance, 2005
People frequently analyze the actions of other people for the purpose of action coordination. To understand whether such self-relative action perception differs from other-relative action perception, the authors had observers either compare their own walking speed with that of a point-light walker or compare the walking speeds of 2 point-light…
Descriptors: Motion, Physical Activities, Visual Learning, Visual Perception
Virji-Babul, Naznin; Kerns, Kimberly; Zhou, Eric; Kapur, Asha; Shiffrar, Maggie – Down Syndrome Research and Practice, 2006
Early intervention approaches for facilitating motor development in infants and children with Down syndrome have traditionally emphasised the acquisition of motor milestones. As increasing evidence suggests that motor milestones have limited predictive power for long-term motor outcomes, researchers have shifted their focus to understanding the…
Descriptors: Cues, Early Intervention, Down Syndrome, Motor Development