<div dir="ltr">Hi,<div><br></div><div>does anyone here use E-Prime for fMRI experiments? We are trying to get it to work and even got the EEfMRI Extension, but the RunBegin Package Call simply refuses to recognise the trigger pulse. I tried simply inserting a wait object and define the parallel port as trigger mask (allowable response {ANY}), and it didn't work either. </div><div>We did a bit of troubleshooting, and ended up changing the cable connecting the scanner to the PC: the cable we normally use transmits the signal to pin Nr. 10 of the port (acknowledge or interrupt pin), if I understood our technician correctly - this works both with Presentation and Cogent software. However, we saw something on the pstnet support page about E-prime recognising input to pins 2 to 9, so we changed that and used a cable that sends the signal to pin Nr. 9. Now we have a very peculiar situation:</div><div><br></div><div>- the trigger pulse is recognised by the wait object, but only sometimes (every 4th, 5th, or 10th pulse is recognised, there does not appear to be a system). When it is registered, it appears as 7 in the E-Dataaid File and in the .pdat file.</div><div>- when I substitute the default allowable input (^) to the RunBegin Package Call to 7, it still isn't recognised at all.</div><div><br></div><div>I am in contact with pstnet support, but we haven't come further than that. </div><div><br></div><div>Has anybody encountered similar problems when setting up fMRI experiments? Any input about your experience and/or settings you came up with will be valuable!</div><div><br></div><div>Thanks,</div><div>Christina</div></div>
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