1. Reliability of Center of Pressure Measures for Assessing the Development of Sitting Postural Control 
Anastasia Kyvelidou, MS, Regina T. Harbourne, MS, Wayne A. Stuberg, PhD, Junfeng Sun, PhD, Nicholas Stergiou, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 90, Issue 7, Pages (July 2009)
DOI: /j.apmr
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

2. Fig 1
Position of infant during data collection. The infant is sitting on the top of a forceplate while a DVD player is in front of the infant for maintaining a calm and relaxed state. There are also reflective markers attached at the trunk and pelvis of the infant but they were not used for the purpose of this study.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

3. Fig 2
Intersession reliability (ICC) for linear parameters of COP across months. Most linear parameter ICCs average around 0.5, and there is an increasing trend as the infant develops. This is not true for mean sway path, for which ICCs are lower than 0.5, and there is a decreasing trend across development.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

4. Fig 3
Intrasession reliability (ICC) for linear parameters of COP across data collection sessions. All linear parameters ICCs average around 0.5, and there is an increasing trend as the infant develops, except for mean sway path ICCs, which present a decreasing trend across development.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

5. Fig 4
Intersession reliability (ICC) for nonlinear parameters of COP across months. All nonlinear parameters ICCs average lower than 0.5, and there is an increasing trend as the infant develops. Abbreviation: CoD, correlation dimension.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

6. Fig 5
Intrasession reliability (ICC) for nonlinear parameters of COP across data collection sessions. All nonlinear parameters ICCs average around 0.5. Abbreviation: CoD, correlation dimension.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions