Week 17 (February 10, 2020 till February 16, 2020)

EEG data was gathered on February 6 with an epoch length of 750ms and other parameters as follows:

- Trials 1-6 were single epochs saved using a 7.5 Hz trigger signal and the checkerboard pattern flickering 2 frames/trigger period

- Trials 7-12 were single epochs saved using a 15 Hz trigger signal and the checkerboard pattern flickering 1 frame/trigger period

- Trials 13-14 were averaged in real time with a 1.9 Hz trigger signal and the checkerboard pattern flickering 2 frames/trigger period

- Trials 15-16 were averaged in real time with a 10 Hz trigger signal and the checkerboard pattern flickering 2 frames/trigger period

- Trials 17-18 were averaged in real time with a 10 Hz trigger signal and the checkerboard pattern flickering 1 frame/trigger period

When analyzing the data, it was very clear even in the time domain that the 1 frame/trigger period were sinusoidal and similar with each other while the averaging the data in real time with 2 frames/trigger period led to a more random signal.

 

With trials 1-12, taking epochs and concatenating became better indicators rather than averaging the signals with a total length of only 750 ms. Power spectral density and spectrogram analyses are shown: