Validation of the Spin-T goniometer, a cervical range of motion device

S. Agarwal, Garry Allison, Kevin Singer

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Objective: To test the validity of the Spin-T goniometer for the assessment of cervical range of movement.Methods: A linear regression analysis for paired neck movements using first a foam head model and then human subjects was performed to quantify the differences between the measurements obtained from the MotionStar, a movement-tracking device, and the Spin-T. A within-subject repeated measures design using simultaneous data acquisition was completed.Results: The coefficient of determination (R-2) for all planes of cervical range of motion for both model and human data sets was higher than 0.99. The regression equations for the model data showed no significant (P > .05) intercept for flexion-extension and lateral rotation. Human data showed statistically significant intercept for flexion-extension (mean, -0.52 degrees) and lateral flexion (mean, 0.81 degrees) at P < .05.Conclusion: This study quantifies the difference between the MotionStar and the Spin-T goniometer and documents the systematic error between the measures. Where the error reached statistical significance, the magnitude of the error was very small (< 1.5 degrees). The results of this study suggest that the Spin-T goniometer may be used as a valid measuring instrument for cervical range of movement.
Original languageEnglish
Pages (from-to)604-609
JournalJournal of Manipulative and Physiological Therapeutics
Issue number8
Publication statusPublished - 2005


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