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Related Experiment Video

Updated: Mar 8, 2026

An Objective and Child-friendly Assessment of Arm Function by Using a 3-D Sensor
07:25

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Upper extremity movement reliability and validity of the Kinect version 2.

Lydia R Reither1, Matthew H Foreman1, Nicole Migotsky1

  • 1a Program in Occupational Therapy , Washington University School of Medicine, Human Performance Laboratory , Saint Louis , MO , USA.

Disability and Rehabilitation. Assistive Technology
|January 20, 2017
PubMed
Summary

Marker-less motion detection systems, like the Kinect 1 and Kinect 2, show good reliability for within-day upper extremity motion analysis. However, between-day comparisons require caution due to movement variability.

Keywords:
Kinectrehabilitationreliabilityupper extremityvalidity

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Motion Analysis

Background:

  • Marker-less motion detection systems offer potential for clinical applications.
  • Previous studies show varied accuracy for Kinect 2 in balance and joint localization.
  • Limited research exists on Kinect 2's validity and reliability for upper extremity movements.

Purpose of the Study:

  • To compare the reliability and validity of Kinect 1 and Kinect 2 against a video motion capture (VMC) system.
  • To assess the suitability of Kinect systems for upper extremity motion analysis in a clinical setting.

Main Methods:

  • One healthy adult male performed six upper extremity movements.
  • Simultaneous data collection using Kinect 1, Kinect 2, and VMC systems.
  • Data analysis using MATLAB, Microsoft Excel, and SPSS.

Main Results:

  • Both Kinect systems demonstrated good within-day reliability.
  • Between-day reliability was inconclusive due to movement repetition challenges.
  • Kinect systems showed high correlation in motion patterns with VMC, despite differing range of motion magnitudes.

Conclusions:

  • Kinect systems can be clinically useful for motion analysis with an understanding of their limitations.
  • Within-day assessments are acceptable; between-day comparisons need cautious interpretation.
  • Kinect 2 offers a cost-effective, portable, and user-friendly alternative to VMC.