A researcher electrically stimulates a part of Raphael's brain, and Raphael "hears" a series of sounds. This researcher most likely stimulated Raphael's lobes

Working memory improves steadily from approximately age 4 to age

15. 20. 25. 30.

Which of the following statements supports the "preserve and protect" hypothesis of sleep?

A) People tend to require more sleep after a hard day of work. B) Sleep deprivation can lead to impaired cognitive abilities. C) Jet lag is usually worse when traveling east than it is when traveling west. D) Many small animals sleep during the day, when they could be easily seen by a predator.