I have a question about running EEG research, which I’m new to. I am working with a few other researchers to set up a new EEG study where we’ll basically show people images and ask them to make keypresses using PsychoPy. We are also going to record EEG data using Emotiv EPOC headsets. I’ve been trying to convince my colleagues that we should try to get 2 computers connected via a parallel or serial port so we can send triggers from PsychoPy to the EEG software automatically when an image is shown, which will be recorded at the exact time the image actually appeared in the EEG data.
However, I’ve now been told that this is not how they normally run things. Instead they present the stimuli and record the EEG on separate computers and do not send any triggers at all. Instead they match the stimuli to the EEG manually, and in some cases time the stimulus presentation using a stopwatch. Is this normal practice?
In my eyes this will lead to inaccurate results as we cannot be 100% sure that the data we analyse belong to the trial we think, as we might be slightly off in matching the stimuli to the EEG. However, I’m not sufficiently experienced in EEG to confidently say that their method is not ok.
Can anyone offer any advice on this?