Table 1.

Variables of the Testing Protocol

Variable	Protocol
Method of angle reproduction	Passive
Tested knee	Both operated and nonoperated
Weightbearing status	Nonweightbearing
Body position	Sitting
Testing instrument	Biodex dynamometer
Demonstrating limb	Ipsilateral
Direction of movement	Extension, flexion
Starting angle	90° for extension, 0° for flexion
Target angles	30° and 60°of flexion
Angular velocity	5 deg/s
Memorization time for target angle	5 s
No. of trials per target angle	6
No. of testing sessions	2
Time between sessions	5 d
Outcome measures	Absolute error, constant error, and variable error