Zhang Wei recently completed a sleep study. For this study, Zhang Wei spent 2 weeks in a building that gave no clue about the time of day. There were no clocks or windows, and the lighting inside remained the same during the entire study. At the end of the study, Zhang Wei's sleep and wake cycle would be MOST likely to average about _____ hours.

Question

Quizplus · Accepted Answer

The human sleep-wake cycle is naturally about 24.2 hours long. In the absence of external cues, such as sunlight or clocks, the body will naturally drift towards this longer cycle.

Zhang Wei Recently Completed a Sleep Study