I’m new to using the Cedrus RB 834 box, and I had a question about interfacing it with the Presentation software from Neurobehavioral Systems. When I try to use it in XID mode, the code it sends to Presentation appears to differ each time, even when pressing the same button. Is this normal? If so, how should I deal with this when writing my program? Any help or advice you can give on setting the box up with the software would be much appreciated.