title: Effects of Filtering the Center of Pressure Feedback Provided in Visually Guided Mediolateral Weight Shifting.
abstract: Thirty healthy adults completed a mediolateral weight-shifting balance task in which they were instructed to shift their weight to visually displayed target regions. A model-based filter and three different moving average filters employing 10, 34, and 58 samples were applied to the center of pressure visual feedback that guided the activity. The effects of filter selection on both the displayed feedback and the shift performance were examined in terms of shift time and non-minimum phase behavior. Shift time relates to feedback delay and shift speed, whereas non-minimum phase behavior relates to the force applied in shift initiation. Results indicated that increasing the number of samples in moving average filters (indicative of stronger filtering) significantly increases shift speed and shift initiation force. These effects indicate that careful selection and documentation of data filtering is warranted in future work and suggest opportunities for strategic filtering of visual feedback in clinical weight-shifting balance activities in order to improve outcomes based on such feedback.
authors.affiliation: Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana, United States of America.
authors.forename: Michael W
authors.initials: MW
authors.lastname: Kennedy
authors.affiliation: Department of Psychology, University of Notre Dame, Notre Dame, Indiana, United States of America.
authors.forename: Charles R
authors.initials: CR
authors.lastname: Crowell
authors.affiliation: Department of Psychology, University of Notre Dame, Notre Dame, Indiana, United States of America.
authors.forename: Michael
authors.initials: M
authors.lastname: Villano
authors.affiliation: Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana, United States of America.
authors.forename: James P
authors.initials: JP
authors.lastname: Schmiedeler
mesh_terms: D000293:Adolescent; D001835:Body Weight / Q000502:physiology*; D056228:Feedback, Sensory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology; D018910:Video Games; D055815:Young Adult