Knowledge Base

Effects on the Coding Scheme

If you import manually scored data without creating a coding scheme in advance, at import of the first file The Observer creates a coding scheme with all behaviors contained in that file. By default, all behaviors are put in a start-stop group named Behavior1. To re-arrange the coding scheme, delete the observation just imported, move the behaviors of Behavior1 to the groups they belong to, and re-import the data.

Independent Variables

The Observer does not import the independent variables from EthoVision XT. You must define those variables in the Observer's Independent Variables List and assign the values of those variables to each imported file. You can find those values in the headers of the original export files.

Data From Multiple Arenas

If your setup includes multiple arenas, for each trial you import one file per arena. If you want to keep data from different arenas (in the same trial) in the same observation, you can import the files of the second, third, etc. arena in the same observation as that of the first arena. To do so, follow these steps:

• Follow the procedure above for the first arena. Right-click the name of the resulting observation and select Properties. Edit the observation name by giving a name that specifies the trial only, not the arena (for example, Open Field Trial 12).
• For the second, third, etc. arena file, instead of following step 6 of the procedure above, in the Project Explorer right-click the observation name and select Import Observational Data, then follow the rest of the procedure. The files are imported in the observation of the first arena as separate event logs. Rename each event log in such a way that it clearly indicates the arena from which it was obtained.

To Import Video in The Observer XT

1. Open the observation, and from the Observe menu select Video, then Open in Current Observation, and select the video file.
2. Choose the option below that applies:
   • If the video file was obtained with programs other than EthoVision XT, or if you tracked from video previously recorded with EthoVision, take note of the difference between the Start time and the Video start time (you can find these in the headers of the raw data export file). This difference is 0 only if you start the trial from the first video frame. Also, take note of the value of Recording after (also available in the export file). Calculate the value of Offset = Start time - Video start time + Recording after.
   • If the video file was recorded with EthoVision while doing live tracking, take note of the value of Recording after (you can find this in the headers of the raw data export file). In your case Offset = Recording after.
3. In The Observer XT, click the Offset button.
4. Then choose Numerical Offset and locate the imported event log. In the corresponding cell, enter the Offset calculated as described above, and make sure that the sign stays positive (+).
5. Open the observation and click the start line of the event log. The video is positioned to the point that the tracking started.

See Also

• Trial vs. Track
• For more information on creating an import profile for The Observer XT, see Importing Other Observational Data in The Observer XT Help.

Camera Installation

Main Topics and Tasks

• Choose Your Camera
• Install GigE Cameras
• Install USB 3.0 Cameras
• Install Analog Cameras
• The Test Environment

Choose Your Camera

Learn About

• Types of Cameras
• Cameras Supported by EthoVision XT
• Using Multiple GigE Cameras

Source: EthoVision XT 19 Help - File Management, Noldus Information Technology