Imagine that NASA conducts a study to find out the length of a person's sleep-wake cycle if all time cues,such as daylight and clocks,are removed.How long would you predict this cycle to be,given these conditions?
A) 16 hours and 32 minutes long
B) 20 hours long
C) 24 hours long
D) 24 hours and 18 minutes long

Question

Quizplus · Accepted Answer

In studies where all external time cues are removed, the average human sleep-wake cycle tends to naturally extend slightly beyond the standard 24 hours, averaging around 24 hours and 18 minutes. This phenomenon is known as the free-running period of the human circadian rhythm.

Imagine That NASA Conducts a Study to Find Out the Length