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PostPosted: Tue Aug 16, 2016 11:47 am 
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Joined: Thu Aug 11, 2016 12:08 pm
Posts: 1
Hi,

We're currently working on a set-up to collect data with a (slightly
modified) Emotiv EEG headset (version 1.0; note that we're still using the provided
amplifier).
For stimulus presentation we chose the "Presentation (Neurobs)" software (17.1)
and to collect the data we use OpenVibe (1.1.0).
Anyway, the presentation of stimuli and the recording of EEG data works
perfectly fine but it seems impossible to create a dataset that brings
both together - the triggers sent by presentation and the EEG recording.
We tried to use Labrecorder (1.11) and the LSL (which should do the job) in the
following set-up:
PC A was used to collect the EEG data using OpenVibe and also to run
Labrecorder during the experiment. PC B simply presented the stimuli
(via Presentation).
The resulting record (we use Matlab/EEGlab for the evaluation) actually
combines both signals but with different timestamps: the triggers sent
by PC B get marked with the uptime (NOT the system time) by PC A. This
is most probably done by Labrecorder.
Is/Was anyone struggling with a comparable problem/set-up?
Our aim is obviously to fix the timestamp issue. I'd be glad about any kind of help although I'm not in the position to change major parts of the setup.
If anyone worked with a similar setup using PsychoPy instead of Presentation, please contact me! I'm really curious.

Regards,
Marta


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