The extent to which the instrument yields the same measurement on repeated uses
Reliability
180-360 protractor with one axis that joins two arms
Universal goniometer
What is the preferred placement of the goniometer
Lateral to the joint, or over the joint
Where is the axis of the goniometer placed
Over the axis of movement of the joint
A Compass inclinometer consists of a fluid filled rotatable container mounted on a plate
OB Myrin goniometer
2 jt ROM
Nontest joint in slack position. Test joint moved through ROM
2 jt mm length measurement
Move into passive insufficiency and measure mm
The degree to which an instrument measures what it is supposed to measure
Validity