The DVD player can be used in conjunction with the Head Tracking software to enable operant conditioning of the subject. When the subject moves his or her head beyond a specified threshold, the DVD player will pause. The duration of the pause can be controlled both by the software and the individual monitoring the movement. This is ideal for training young subjects on how to be still in the scanner.
Turn the DVD player that is labeled DVD on.
Insert the desired DVD into the DVD player labeled DVD.
On the “ViewSonic” switcher, which rests on top of the DVD players, press the “input” button until the “s-video” display comes up on the monitor in the mock scanner. You should be able to see the DVD playing.
Set the DVD to the desired segment, and press pause.
Set up the head tracking software (see full instructions above).
Optional settings
You can turn the scanner sounds DVD player on and play the scanner sounds simultaneously with the DVD. This helps simulate the noise of the scanning environment. Please note, that the scanner noise is much louder at the actual scanner.
Volume for both the DVD and the scanner sounds can be adjusted with the main volume control on each respective DVD player.
Other notes
If the subject makes a large movement, you may need to click on the “Re-zero Position” for the lines to reappear in the tracking window.
If the subject makes a large movement, you may need to click on the “Play/Pause” button to re-start the DVD.