An EEG technician is watching the record of the brain waves of a sleeping patient and notices that this person is producing primarily delta waves. What stage of sleep is this person in at this time?
a) stage 1
b) stage 2
c) stage 4
d) REM sleep
Question 2
About __________ of people who have experienced a major depressive disorder will experience at least one more episode during their lifetime.
a) One quarter.
b) Half.
c) Two thirds.
d) Three quarters.
