Which device would a sleep researcher use to monitor a sleeping person's brain waves?
A) electromyogram (EMG)
B) electrocardiogram (EKG)
C) electro-oculogram (EOG)
D) electroencephalogram (EEG)
Answer: D
Rationale: Sleep cycles themselves are most often defined by the electroencephalogram or EEG, a device that measures brain waves.
Psychology
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a) pariah b) ingroup c) threat-group d) outgroup
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