# Approach rearing subject

Definition

A discrete (state event) variable that is scored when the focal subject approaches another subject in rearing posture.

Calculation

This variable combines the variables Social approach and Rear in contact. The state Approach rearing subject is scored when:

▪The focal subject is approaching the other, that is, the distance between the two shortens, and that distance is shorter than two times the average body length of the approached subject, calculated throughout the entire track.

▪The speed of the focal subject is higher than that of the approached subject.

▪The approached subject is in rearing posture, defined as any time that subject's nose point is at least 40 mm higher than its tail base. Rearing in contact occurs within 15 video frames (that is, 0.5 s for video at 30 fps) from the end of the Social approach event.

How to specify Approach rearing subject

1.Open an Analysis profile and in the Dependent Variables panel, under Social, click the Add button next to Approach rearing subject.

2.Complete the procedure to add the variable to the Analysis profile. See Calculate statistics: procedure

See also

▪Social approach

▪Rear

▪Live Mouse Tracker