Knowledge Base

Variables (Continued)

Weighted Movement From

Use to calculate net relative movement to/from another subject. In the Receivers tab, select the other subject and its relevant body points.

In the Condition window, select Current as Statistic, then click Settings. In the Weighted Movement From tab, specify at which maximum distance the subjects should be considered as 'interacting'. In the Actors tab, select the focal subject and its body point that you want to use to calculate weighted movement from another subject. In the Receivers tab, select the other subject and its relevant body point.

Weighted Movement To

In the Condition window, select Current as Statistic, then click Settings. In the Weighted Movement To tab, specify at which maximum distance the subjects should be considered as 'interacting'. In the Actors tab, select the focal subject and its body point that you want to use to calculate speed of moving to another subject. In the Receivers tab, select the other subject and its relevant body points.

More About Conditions Based on Dependent Variables

Conditions Based on Multiple Dependent Variables

Use a Multi Condition to let EthoVision carry out an action when the subject performs a combination of behaviors. For example, to stop tracking when the subject's nose point has been in the novel object zone while having its head directed to the object for 20 seconds.

1. In the Components pane, under Conditions, double-click the name or click the button next to the Multi Condition.

   Tip: If you do not see the variable name, click the More button.

2. The Multi Condition window opens. Under Name, enter a Condition Name. Under Comment (at the bottom) enter a description (optional).
3. Click the Settings button. In the Actors tab, select the subjects to which the conditions apply.
4. Click Add Condition. Select a dependent variable from the list. Click the Settings button and specify the details for this condition. See the paragraph on using this dependent variable as a condition for details.
5. In the Is: field, specify the criteria, for example When nose-point is in zone Novel Object = True.
6. Repeat steps for other conditions.
7. From the list at the bottom, select whether all conditions or one of them should be met. Click OK.
8. Under Condition Is Met When, select the Statistic you want to use.

Frequently-Used Statistics

• Current: For conditions that are met when the dependent variables are true or not true at the current sample.
• Frequency: For conditions that are met when the dependent variable values occurred a number of times.
• Cumulative Duration: For conditions that are met when the dependent variable values occurred for a specific time since the activation of the condition.
• Current Duration: For conditions that are met when the dependent variable values occurred continuously for a specific time.
• Latency to First: For conditions based on the latency to the first occurrence of the dependent variable.

You cannot use conditions based on hardware devices in multi conditions. If you want to use multiple conditions with hardware devices, use multiple condition boxes with an Operator instead. See Operators for more information.

Source: EthoVision XT 18 - THC - Trial and Hardware Control, Noldus Information Technology