Response collection

Button boxes

We have two 4-button optical button boxes for use with the MEG. Usually all 8 outputs will be connected to the trigger box in the stimulus cabinet. The channels used are 9-16. These boxes can be used with the table insert for the MEG seat. They are a bit slippery and produce an audible click when pressed, and it might be good to put them on a mouse mat for these reasons (the mat prevents the table insert to resonate with the button click, making it a bit quieter).

ImageLink(buttonboxes.pgn, //MegCBU, height=700)

Elekta Neuromag also supplied us with two button panels, which work in a different way. There's no button but a strip of material that has to be pushed down. The normal button boxes will click when switching, but these EN panels don't give any tactile feedback. They also have a tendency to come on again if the strip is pushed deeper, producing the sequence on-off-on-off-on for a single press and release.

These panels can also be used 'upside down' and will then detect when a finger is put down. This requires the subject to lift their finger in between responses.