OpenViBE forum

The Neuropsychology Lab at the University of Oldenburg (Germany) is seeking to fill the position of a Postdoctoral Research Associate / Research Associate (wissenschaftliche Mitarbeiterin / wissenschaftlicher Mitarbeiter, E13 TV-L, 100%). We are seeking a postdoctoral research associate with a stron...

Laurent,
Great, thanks very much!
Best,
stede

Hi there, we noticed problems with the motor-imagery neurofeedback version in the current version of openvibe. The stimulation works fine, but the training scenario never produces any resul with newly recorded data, while it works with the demo data. It seems that the Lua script controlling the stim...

Hi there, I did some more testing, using different hardware (two notebooks, one PC), but the problem persists. The two figures illustrate the jitter: Each figure shows the single-trial EEG response (and average in red) for the off-stimulation (left), a condition a (middle) and a condition b (right) ...

Hi lbonnet, Thanks much for working on this!!! I checked the new version, and apparently you fixed one of my problems, which is great: The sound-off event marker (stimulation) is now much more precise in timing, so the Stimulation Multiplexer seems happy now. However, my main problem is the temporal...

Hi there, I am trying to get a simple auditory oddball paradigm running, and use the lua stimulator and the sound player (one for standards, one for deviants), followed by the stimulation multiplexer, to write the data into a gdf file. Sounds are wav files of 50ms duration, the isi is jittered (scen...

Thanks a lot for fixing it.... but how do I get the patch?
stede

Hi Stefan You have to play with the settings a little bit to get it up and running online. Use a modified online session for the recording of the training data, otherwise there will be fundamental problems with the stimulation markers (for details pls consult the ov experts, I am ov newbie. We use b...

Dear Laurent, Thanks very much for your helpful reply. Just to be sure I get it right: The LDA performance here corresponds to the detection of one flash to be P300 or not. On a 6x6 matrix flashed by row and column, the chance level is 5/6 = 0.76 I guess you mean 1/6 = .17 chance level that one (out...

Hi there, First of all big thanks for developing OV, it's really powerful and instructive. I do have a really simple, if not stupid question regarding the callibration of the p300 speller scenario. When using LDA I get quite reasonable performances between 65 and 85%, depending on the subject, the E...