I am having trouble with the LU400-PAIR response pads: during fMRI trials, we sometimes register responses from each button as if they were all pushed simultaneously (which is not the case).
Our pads are connected as described at http://www.cedrus.com/lumina/howitworks.htm
We would like to test whether the problem comes from the OTEC unit or the lumina controller by registering signals supplied from the output of the penetration panel.
Does anybody have a description of the OTEC cable pin by pin in relation to to the pads buttons?
Thanks in advance.