Re: More visual entrainment data

A group I was part of in college made some projects with SSVEP using
commercial headsets - you can get very good signal with it, and it's not
difficult to induce. We got the best results using P7, O1, O2, and P8
electrodes. We used emotiv headsets, and since there is an open source
library for accessing its signals (emokit), we were able to splice our code
into an ebook reader. We weren't experts in the field and had trouble with
peak detection, but we got it working reasonably reliably with a 5-second
response time. A bit long, but at least it worked.

Also, fun fact - we didn't look too far into this, but some initial testing
showed that you can also probably generate the signal using binaural audio.

On Wed, May 7, 2014 at 9:25 AM, Chip Audette <[email protected]> wrote:

>  Continuing my work with visual entrainment, I used a photocell with my
> Arduino to measure the actual blink rate produced by my computer…
>
>
>
>
> http://eeghacker.blogspot.com/2014/05/measuring-video-blink-rate-with-arduino.html
>
>
> It showed that my computer cannot generate steady blinking faster than 10
> Hz.  As a result, I don’t have a chance of entraining brain waves at faster
> than 10 Hz.  This is important if I plan on using this setup as the basis
> for BCI based on visual entrainment.
>
>
> It’s pretty cool what you can do with a $1.50 photocell.
>
>
> Chip
>
>
>
>
>
> *From:* Chip Audette
> *Sent:* Sunday, May 04, 2014 6:00 PM
> *To:* [email protected]
> *Subject:* More visual entrainment data
>
>
>
> I’ve resumed my exploratory work with visual entrainment...aka,
> steady-state visual evoked potential (SSVEP).  I’m headed towards making
> Brain-Computer Interface (BCI) based on it. In my latest post, I’ve induced
> brainwaves at different frequencies using movies on my computer. If you’re
> interested, you can check it out here:
>
>
>
>
> http://eeghacker.blogspot.com/2014/05/visual-entrainment-blinking-screen.html
>
>
>
> I'm really excited for the next steps...two blinking frequencies at the
> same time.
>
>
>
> Has anyone else tried SSVEP for use as a BCI?
>
>
>
> Chip
>
>
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