TABLE 2.

Behavioral Indices Recorded During Training

Index	Index Definition	Rating Scale	Rating Scale Definition
Willingness to Participate	The ease with which the animal raises head into place to be yoked. Only applicable when animal is yoked.	0	Trainer had to lift collar with pole
		1	Trainer had to move chair bottom up
		2	Animal positions head willingly with prompt
Reactivity	The extent to which the animal generates behaviors in response to the chair, room, and/or trainer.	0	Not reactive
		1	Mildly reactive: Mild threats, aggression, fear or nervousness. Minimal number of short bouts.
		2	Moderately reactive: Either longer or more frequent bouts of mild threats, aggression, fear or nervousness.
		3	Very reactive: Overt threats, aggression, fear, nervousness. Magnitude of reaction moderate. Sustained for most of day.
		4	Extremely reactive: Overt threats, aggression, fear, nervousness. Magnitude of reaction great. Sustained for length of day.