Accuracy of Voice-Announcement Pedometers for Youth with Visual Impairment
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Thirty-five youth with visual impairments (13.5 ± 2.1yrs, 13 girls and 22 boys) walked four 100-meter distances while wearing two units (right and left placement) of three brands of voice-announcement (VA) pedometers (CentriosTM Talking Pedometer, TALKiNG Pedometer, and Sportline Talking Calorie Pedometer 343) and a reference pedometer (NL2000). Registered pedometer steps for each trial were recorded, compared to actual steps assessed via digital video. Inter-unit agreement between right and left VA pedometer placement was low (ICC range .37 to .76). A systematic error was observed for the VA pedometers on the left placement (error range 5.6% to 12.2%), while right placement VA pedometers were at or below ± 3% from actual steps (range 2.1% to 3.3%). The reference pedometer was unaffected by placement (ICC .98, error ~1.4%). Overall, VA pedometers demonstrated acceptable accuracy for the right placement, suggesting this position is necessary for youth with visual impairments.
Michael W. Beets is with the Department of Public Health at Oregon State University, Corvallis, OR. Email: beetsm@onid.orst.edu. John Foley is with the Physical Education Department at SUNY Cortland, NY. Daniel W.S. Tindall is with the Department of Kinesiology at Central Missouri State University. Lauren J. Lieberman is a professor at SUNY Brockport in the area of Adapted Physical Education.
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