Average Waveforms

Here, we plot the waveform of the averaged data using EEGLAB. For example, we may want to plot the average waveform of the scene stimuli for a specific subject.

Now we switch back to EEGLAB. In this example, I’ll plot the average waveform for all the scene stimuli for subject 005.

Grand Grand Averaging

Grand grand averaging refers to averaging all of the data of one type (such as all scene stimuli or all face stimuli) together. The more data is averaged together, the better the waveform will be.

To plot a grand grand average, you use the same process as plotting an average waveform, except you select all of the scene (or face) stimuli for all of the subjects.