Nesting over Relative movement

Aim

To pick out data collected when one or more subjects (Actors) were moving to or away from one or more other subjects (Receivers).

example Analyze the velocity when the subject was moving away from another subject.

Nesting vs. Nesting over Subjects

Notice the difference when there are multiple subjects in the same arena:

▪To select data of a subject based on the Relative movement of that subject, choose Relative movement under Nesting. In the Receivers tab you specify which subject the focal subject was moving to/from. See the procedure below.

▪To select data of a subject based on the Side-by-side behavior of other subjects, choose Side by side under Nesting over Subjects. There you find the Actors tab and the Receivers tab where you can specify which subject (Actor) was moving to/from which other subjects (Receivers). See Nesting over subjects

Procedure

1.In the Data Profile, under Nesting click the button next to Relative movement.

2.In the Relative Movement window:

▪Enter the Maximum interaction distance.

▪Enter the Minimum velocity that defines movement.

▪Under Calculate nesting for, choose the state that defines the intervals.

For details about how Relative movement is calculated, see Dependent Variables in Detail > Relative movement.

3.Click the Body Points tab (when available), and specify the body points that define movement. Choose whether movement is based on all body points moving simultaneously (All selected points) or not (Any selected point).

4.Click OK. Proceed with step 4 in How to select track segments.

Notes

On the Receivers tab:

▪To select the samples when one subject moves to the other, select both subject 1 and subject 2, and choose Any selected subject from the list.

▪To select the samples when one specific (focal) subject moves toward other subjects simultaneously, do not select the focal subject under Receivers. Select all the other subjects and choose All selected subjects from the list.