EEG Signal Collection

The Muse headset, pictured below, was used to collect EEG data

museheadset

  • The headset is first calibrated with the Muse phone application to ensure the headset was properly situated on the participant
  • It is then paired via Bluetooth to the MATLAB program written by Dr. Ching’s laboratory
  • When the participant began the controls section, the spacebar was pressed to mark the starting point of that section and then pressed again to mark the ending point of that math section
  • When the first researcher flipped over the first card signaling the start of the period where the participant experienced risk, the spacebar is pressed again to mark this point
  • After the participant decides whether the next card drawn from the deck is higher or lower and how likely it is they are correct, the space is pressed again to mark the end of the period during which they experience risk. This process is repeated throughout the duration of the experiment
  • The MATLAB program then outputs the following graph:
    trial29
  • Each section between the green and red dots represents the sections where the participant experienced risk, except for the first set which represents the control experiment. The red and green lines show the frequency of the left and right frontal parietal lobes and the dark and light blue lines show the frequency of the left and right temporal parietal lobes
  • In addition to the EEG signals being collected, the acceleration data of the headset and the time in-between readings were also recorded