Rebecca is hooked up to an electroencephalograph (EEG) in a sleep lab. As the researcher watches the printout from the EEG, delta waves appear. Based on this information, the researcher can conclude that Rebecca
A)has just entered stage 1 sleep.
B)is still awake, but is relaxed and drowsy.
C)is currently in REM sleep.
D)has just entered stage 3 sleep.

Question

Quizplus · Accepted Answer

Delta waves are characteristic of deep sleep, which corresponds to stage 3 sleep in the sleep cycle. This stage is associated with the deepest level of sleep, where delta waves are most prominent.

Rebecca Is Hooked Up to an Electroencephalograph (EEG) in a Sleep