In order to remember your dreams, you decide to have a friend wake you up when you are likely to be dreaming.To maximize the chance of this happening, your friend should wake you up
A)after 15 minutes.
B)after 45 minutes.
C)after 90 minutes.
D)after 3 hours.

Question

Quizplus · Accepted Answer

This is because REM sleep, the stage in which most dreaming occurs, typically occurs in cycles of about 90 minutes. By waking up after 90 minutes of sleep, there is a higher likelihood that the person will be in a stage of REM sleep and thus more likely to remember their dreams. Waking up after only 15 minutes may not give enough time for the individual to enter REM sleep, and waking up after 3 hours may be too late in the sleep cycle.

In Order to Remember Your Dreams, You Decide to Have