SSVEP noise can also be due to jitter in your light source. This is especially the case with programmatically controlled monitor screen flashing. Several previous threads / posts addressing this.

While this is mostly examined while using the MindAffect decoder, I also notice a lot of noise when running SSVEP experiments independent from the MA system and so it is not just isolated to the decod

Visual stimulation is delivered via monitor screen with only one frequncy at a time for about 10 seconds. The interesting thing is that using the same stimulation method I was able to get ssVEP with o

https://openbci.com/forum/index.php?p=/discussion/2485/not-seeing-fft-peaks-in-ssvep-with-openbci-psychopy-flash-generator

For my research I am trying to get ssVEP (peak in FFT) due to visual stimulation with given frequencies. I am using Ganglion board and gold cup electrodes, 3 active electrodes are placed on the O1, O2

But SSVEP is easy.

out that it is easier sometimes to entrain the SSVEP if you use a flash frequency that is the same as the subject's natural alpha Hz rate, so I would try that flash stimulus frequency next, with eyes

I was also looking to openVibe SSVEP basic experiment they have some inbuilt activation. But I have a mac, do you think openVibe running on a windows VM will hog the cpu. Generally Cyton streaming wil

Precisely exact alignment with O1 O2 is generally not needed. Where were you measuring for SSVEP previously?

Thanks, yes correct I will try that too. But before that I will try 10hz alpha wave. I understand about the accuracy perspective but first atleast some peaks around a range or harmonics should be seen

Here is a survey / review paper on flash generation techniques used in SSVEP. Perhaps one of these authors would share their software technique with you. I continue to think that Chip's approach of us

I did not try alpha peaks, is it related in some way to SSVEP?

Chip Audette, in his SSVEP posts, used a movie file to achieve more stabile timing. This is because the video playback chain, enforces precise frame to frame spacing.

I am trying to get SSVEP work with OpenBCI. I have cyton board and Ultracortex mark IV.

Boolean checkForData() { if (this.dataType.equals("TimeSeries")) { return dataProcessing.newDataToSend; } else if (this.dataType.equals("FFT&

Here is a link with an example of an cVEP application running with Ganglion. It is using a form of Visual Evoked Potentials, that is "code based". As opposed to VEPs like SSVEP Steady State

Please remember, SSVEP does not need highly precisely synchronized external trigger. Such triggers recorded with the EEG (in Aux channels), are mainly used in P300.

SSVEP does not need an external trigger, it's only required for P300 to get the precise timing between the onset of the control or oddball stimulus, and the P300 response. This timing allows averaging

a) Is there another option you would suggest for triggering in SSVEP study that is wireless?

If you are only doing SSVEP, you should not need external trigger capability. External trigger is more relevant for P300 / ERP.