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What do membrane keyboards feel like? 

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The findings indicate that keyboards with make-force levels over 0.59 N are ergonomically inadequate.
Buckling spring keyboards have better feedback characteristics, which may be responsible for a decrease in the amount of typing force and EMG produced.
These studies demonstrate the inferiority of alphabetically organized keyboards as compared with a randomly organized keyboard and the standard Sholes (qwerty) keyboard.
Applications: These findings may influence keyboard standards and the design of keyboards.
Overall, there was a significant correlation between improvement of pain severity and greater satisfaction with the keyboards.
Our findings are useful for developing flat keyboards with assistive information through sensory feedback.
The keyboards also demonstrate consistent behavior in generating voltage signals regardless of touching objects’ materials and environmental effects like humidity.
also suggest the increased importance of experience on these smaller keyboards.
Results show a clear advantage in both performance and satisfaction for the mechanical-key keyboards.
Many of the findings in our study also apply to traditional soft keyboards tapped with a stylus or one finger.

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