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Changes in Motor Performance When Throwing a Ball With and Without Visual Feedback

dc.contributor.advisorRieser, John J.
dc.contributor.authorKhuu, Ngoc-Thoa
dc.descriptionMentor: Dr. John Rieseren_US
dc.description.abstractThis study explored the roles that vision and proprioception play in learning while throw a ball repeatedly to a fixed location. In two experiments, participants threw a baseball to a target 12 meters away while wearing sound-cancelling headphones to block out auditory feedback. In Experiment 1 participants could freely see the target, but as soon as the ball left their hands, their vision of the ball’s flight and landing was occluded by liquid crystal goggles. Measurements of the ball’s distance of travel along the ground and variability of landing locations were recorded to observe participants’ throwing accuracy and consistency across 100 trials. Results show that participants almost always threw short. The throws improved in consistency for the first half of the trials, showing that people can use proprioceptive feedback to improve the consistency of their motor performance. Experiment 2 was similar to Experiment1, except half of the participants could see the ball’s flight trajectory. Both groups started out throwing short of the target, but the group with visual feedback threw increasingly closer to the target across the 30 repeated trials. Both groups improved their throwing consistency. Kinematic analysis showed that people depended on the ball’s initial velocity rather than the release angle to regulate the distance the ball traveled.en_US
dc.description.sponsorshipThesis completed in partial fulfillment of the requirements of the Honors Program in Psychological Sciencesen_US
dc.publisherVanderbilt Universityen_US
dc.subjectvisual feedbacken_US
dc.subjectproprioceptive feedbacken_US
dc.subject.lcshMotor abilityen_US
dc.subject.lcshMotor learningen_US
dc.subject.lcshFeedback (Psychology)en_US
dc.subject.lcshVisual learningen_US
dc.titleChanges in Motor Performance When Throwing a Ball With and Without Visual Feedbacken_US
dc.description.collegeArts & Sciencesen_US
dc.description.schoolVanderbilt Universityen_US
dc.description.departmentPsychological Sciencesen_US

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