Journal of Ergonomics Research.

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Research Article, J Ergon Res Vol: 3 Issue: 1

Validity and Reliability Study of Head-Neck Motion and Postural Tracking Using Neck watch- A Wearable Device Prototype

Sharon MH Tsang1*, Grace PY Szeto2, Mary LS Chan3, Andrea CK Choi3, Kate LK Lou3, Hillary HY Wong3, Tiom ZC Xu3 and Raymond YW Lee4

1Assistant Professor, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hunghom, Hong Kong

2Professor, School of Medical and Health Sciences, Tung Wah College, Hong Kong

3BSc Physiotherapy student, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University; Hong Kong

4Professor of Biomechanics and Associate Dean, Faculty of Technology, University of Portsmouth, the United Kingdom

*Corresponding Author : Sharon MH Tsang
Assistant Professor, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hunghom, Hong Kong
Tel: (852) 27664332
Fax: (852) 27641435
E-mail: [email protected]

Received: December 30, 2019 Accepted: January 17, 2020 Published: January 24, 2020

Citation: Tsang SMH, Szeto GPY, Chan MLS, Choi ACK, Lou KLK, Wong HHY, Xu TZC, Lee RYW (2020) Validity and Reliability Study of Head-Neck Motion and Postural Tracking Using Neck Watch: A Wearable Device Prototype. J Ergon Res 3:1. doi: 10.37532/jeor.2020.3(1).109

Abstract

This study examined the validity and reliability of an inertial measurement unit prototype, Neck Watch in measuring headneck kinematics. Head-neck kinematics was acquired simultaneously by Neck Watch and Noraxon systems in 14 healthy young adults whilst performing 4 types of movements or postures. Validity of measurement was determined using Coefficient of Multiple Correlations (CMC), Pearson’s r and Limits of Agreement (LOA), while reliability of measurements was assessed by Intra-class Correlation Coefficients (ICC). Good to excellent CMC and r values were found for standard and combined movements. Large variability for width of LOA was revealed across different movements/postures. Excellent internal consistency shown in Neck Watch indicates minimal within-subject variability. Modest to excellent ICC results found for intra- and inter-rater reliability with standard. Neck Watch prototype is valid and reliable in measuring single-plane movements. Yet, improvement is needed for recording static postures and functional movements.

Keywords: Inertial measurement unit, Head-neck postures, NeckWatch, Reliability, Validity

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