Agreement between a frequency-weighted filter for continuous biomechanical measurements of repetitive wrist flexion against a load and published psychophysical data

Article Abstract:

A study modeled subjective discomfort for repetitive wrist flexions using controlled posture, pace and force. Discomfort was recorded ona 10 cm visual analogue scale and results showed that main effects of force, wrist flexion angle and repetition were significant and no second-order effects were seen.A pure error test model showed no significant lack of fit, and the continuous model was compared and agreed with data from other published studies.

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Gain effects on performance using a head-controlled computer input device

Article Abstract:

The influence of a head-controlled computer input on control-display gain and physical performance was investigated using a Fitts' task. The results showed that gain significantly affected movement time of the pointing devices. Small target widths and long movement amplitudes were the most affected by gain. Increased head-controlled pointer gain resulted in increased movement time.

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Validation of a frequency-weighted filter for continuous biomechanical stress in repetitive wrist flexion tasks against a load

Article Abstract:

A frequency-weighted filter was validated for continuous measurements of force, posture and repetition using a peg transfer task. Subjective discomfort was reported after performing the task for one hour using a 10 cm visual analogue scale. Wrist flexion angular data was continually recorded using an electrogoniometer.

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