Table 1.

Description of scores for the assessed behavior parameters during the video analysis

Parameter	Volume of vocalization	Kind of vocalization	Kind of movement
Score
1	No vocalization	No vocalization	No movement
2	Silent grunting	Short, rare vocalization	Minor movement
3	Low squealing or whimpering	Discontinuous vocalization with longer breaks (>  3 s)	Stretching of legs and head shaking
4	Moderately loud screaming	Discontinuous vocalization with shorter breaks (<  3 s)	Struggling and occasional escape attempts
5	Deafening screaming	Continuous vocalization	Defense movements and continuous escape attempts