Experiment Parameters
1200
stimuli are presented at random. Exactly
300 of each stimulus will be presented.
Intervals
experiment:
1-second
stimuli; 1-second break between stimuli
Breaks
presented after every 12 stimuli (subject controls break length)
“Halfway
through experiment” message presented to subject at halfway point
Total
length:
1200*(1
sec [stim] + 1 sec [break]) = 2400 sec/60 = 40 minutes without breaks
Melody
experiment:
1.5-second
stimuli; 1-second break between stimuli
Breaks
presented every 10 stimuli (subject controls break length)
Halfway
message as above
Total
length:
1200*(1.5
sec [stim] + 1 sec [break]) = 3000 sec/60 = 50 minutes without breaks
28
electrodes are applied in the standard 10-20 configuration as shown:
The
HEOG and VEOG electrodes are applied near the outer corner and above the
eyebrow of the right eye. The reference
electrode (A2) is applied behind the right earlobe.
Subjects
are instructed to focus the eyes on a fix point (“+”) in the center of the
screen while attending to the sounds.
Subjects are asked to avoid blinking while the stimuli are playing. The HEOG and VEOG electrodes track eye movements,
though, so extraneous blinking can be removed during analysis by not including
those
Stimuli
are presented using Presentation software
and EEG data is recorded using Neuroscan
4.2.
Click
here for the Intervals (1.1) Presentation
script.
Click
here for the Melody Presentation
script.