Quick update on our experiment: We are nearing completion of our pilot tests and equipment upgrades. We will begin our first formal experiment soon (likely just a few weeks away!). The follow figures are examples of raw EEG data taken from four occipital (back of the head) electrodes and the digital channel, which records an external electronic signal. The digital channel is used to identify stimulus type (light, sound, or null) and duration.
The first figure shows a light flash. The digital channel (bottom row) is hooked up to two miniature solar panels which record the duration of the light flash. We can then look at the data recorded from the electrodes to see any physiological effects.
This second figure shows a control trial. The digital channel is sent a longer pulse which tells an analysis program to mark this time region as control data.