Lowering body and brain activity and metabolism during sleep may help conserve energy and lengthen life, according to which theories of sleep?

Failing to reject the null hypothesis when the research hypothesis is true is

A) effect size. B) power. C) a Type I error. D) a Type II error.

Setting realistic goals, ordering your priorities, and slowing down are ways of dealing with which of the following aspects of stress?

a. bodily effects b. upsetting thoughts c. ineffective behaviors d. emotional response