Keyboard design through physiological strain measurements.
The physiologically tolerable range of positions for the joints of the upper extremities have been investigated for typing tasks by recording the myoelectric activities of the involved muscles. For long-term typing tasks a split keyboard is recommended allocating a key field to each hand. The fields should be rotated against each other in the horizontal plane and inclined laterally.
Zipp
P
P
Institut für Arbeitswissenschaft der Technischen Hochschule, Petersenstr 30, 6100 Darmstadt, Fed. Rep. Germany.
Haider
E
E
Halpern
N
N
Rohmert
W
W