Research design and instrumentation
The study was conducted using a repeated measures design consisting of two testing sessions per day on two separate testing days.
The reliability of joint angle data collected by two different testers on two different days was compared for 2 sessions (days) × 2 testers × 5 trials.
In this study, the ‘intra-subject’ reliability refers to the repeatability of performance over 5 trials within each test session without removal of markers.
The ‘test-retest’ reliability refers to the repeatability from one test session to the next with reattached markers.
‘Inter-tester’ reliability refers to the repeatability between different tester’s sessions in the same day with reattached markers.
A VICON 140TM three-dimensional motion analysis system (Oxford Metrics Ltd., Oxford, UK) and VICON Clinical ManagerTM (VCM) software were used to capture and analyze the walking patterns of the subjects.
The system utilized 4 infrared cameras located at angles around a 10-m walkway.
These cameras were placed on diagonal lines intersecting at the center of the walkway (Fig. 1).
Each walking trial was videotaped by a standard video camera located towards the center of the walkway to assist
with analysis of the data.
All tests in this study were carried out at the Gait Laboratory of the Geriatric Research Unit at the Kingston Centre with the approval of the Kingston Centre Research and Ethics Committee, Southern Health Network, Victoria, Australia.
Research design and instrumentationThe study was conducted using a repeated measures design consisting of two testing sessions per day on two separate testing days. The reliability of joint angle data collected by two different testers on two different days was compared for 2 sessions (days) × 2 testers × 5 trials.In this study, the ‘intra-subject’ reliability refers to the repeatability of performance over 5 trials within each test session without removal of markers. The ‘test-retest’ reliability refers to the repeatability from one test session to the next with reattached markers. ‘Inter-tester’ reliability refers to the repeatability between different tester’s sessions in the same day with reattached markers.A VICON 140TM three-dimensional motion analysis system (Oxford Metrics Ltd., Oxford, UK) and VICON Clinical ManagerTM (VCM) software were used to capture and analyze the walking patterns of the subjects. The system utilized 4 infrared cameras located at angles around a 10-m walkway. These cameras were placed on diagonal lines intersecting at the center of the walkway (Fig. 1).Each walking trial was videotaped by a standard video camera located towards the center of the walkway to assistwith analysis of the data.All tests in this study were carried out at the Gait Laboratory of the Geriatric Research Unit at the Kingston Centre with the approval of the Kingston Centre Research and Ethics Committee, Southern Health Network, Victoria, Australia.
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