Is what you see what you get? Standard inclinometry of set upper arm elevation angles
Meticulously set upper arm elevation angles were measured by standard inclinometry. A downward bias was found in the inclinometer results, particularly at angles>60. A 2-point, subject-specific, linear calibration was effective at removing bias. Calibration equations were developed for studies lacking 2-point calibration data. Elevations gauged by inclinometry and observation need adjustment to a common scale.
observation measurement error working postures