# Analyze trial control data

Aim

To analyze the events of the Trial Control rule which occurred during a trial. For example, visualize when a condition became true, or when EthoVision sent a command to an external device. You may want to do this for two reasons:

▪To test if the Trial Control rule works as expected.

▪To analyze the subject's response to presentation of stimuli in conditioning tests.

To visualize or calculate statistics of Trial Control data

1.Choose Analysis > Analysis Profile > New. In the Components pane, under Trial Control, click the button next to

Trial Control event for example, to visualize when exactly a condition become true.

Trial Control state for example, to visualize the time from the moment a condition became active to when the condition became true.

2.Calculate statistics or visualize the data (choose Analyze > Results > ...).

For details, see Trial Control in the Analysis profile , and Analysis of Trial Control data in the EthoVision XT 19 - Trial and Hardware Control - Reference Manual.

To analyze intervals based on Trial Control data

If you want to calculate statistics and visualize data of dependent variables like velocity in portions of a track based on Trial Control data, do the following:

1.In the Data profile, define an interval based on Trial Control data. You can use:

Nesting over a Trial Control state or

Nesting over a Free interval based on Trial Control events.

2.Specify the dependent variables in the Analysis profile.

3.Calculate statistics or visualize the data (choose Analyze > Results > ...).

To export Trial Control data

See Export Trial Control data.