Researchers are most likely to use an electroencephalograph to measure their brain wave activity throughout the night. Formulating a hypothesis. Find out what goes on in people's brains during a typical night's sleep, Proposes that there is a relationship between the amount of sleep deprivation and the ability to solve complex mental tasks; the more sleep deprived people are, the more mistakes they are likely to make.
Milk and milk products provide much of the vitamin D in people’s diets.
