2026-09-18T20:14:14Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/86397 2023-07-11 col_2142_5131 col_2142_16278 com_2142_5130 com_2142_16277 com_2142_9614

Karl Rosengren Elizabeth Hsiao-Wecksler Doyle, Richard John 2015-09-28T15:04:28Z 2015-09-28T15:04:28Z 10000-01-01 2008 2008 The reliability of common Center of Pressure (COP) measurements was systematically investigated. Studies on the control of posture during quiet standing using force platform data lack standardization in measurement protocols (especially trial length and number). Guidelines for methodology that met acceptable reliability levels were established in both normal and altered visual conditions (Studies 1 and 2) and across multiple age populations (Study 3). The tools of Generalizability Theory (G-Theory) were used to thoroughly examine the reliability of both summary and time-varying measurements of COP. G-Theory is a powerful reliability analysis tool that permits the systematic inspection of identified components of variance (i.e. length of trial and number of trials) and subsequently provides feedback on establishing protocols meeting acceptable levels of reliability. The results of all three studies indicate that, when investigating quiet standing using COP measurements from a force platform, a minimum of 5 trials should be completed at 60 seconds in length. Most measurements included in these studies reached acceptable levels of reliability at or before this point. Reliability is a critical component of research design and the guidelines established in these studies can be used when designing future studies. Made available in DSpace on 2015-09-28T15:04:28Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3314960.pdf: 2051824 bytes, checksum: 7ac453efd7518ddefcffd20efd810cb3 (MD5) Previous issue date: 2008 Embargo set by: Seth Robbins for item 87678 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 146 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2008. http://hdl.handle.net/2142/86397 (MiAaPQ)AAI3314960 eng Health Sciences, Recreation Generalizability of Center of Pressure Measurements Across Age Populations text Kinesiology and Community Health Kinesiology and Community Health University of Illinois at Urbana-Champaign Dissertation Ph.D.