Every morning, Janna almost falls asleep in the shower. Lamont is no good until he's had several cups of coffee, or until 11 A.M.-- whichever comes later. Janna is probably a(n)_____, while Lamont is probably a(N) ____.

Children who suffer from bipolar disorder typically:

a. have mania that is episodic and cycles slowly b. are more likely to exhibit a euphoric high than irritability c. display symptoms that are similar to ADHD or conduct disorder d. have symptoms that are very similar to those of adults

Dr. Yates forms the hypothesis that students who sleep more prior to taking an exam will score higher on the exam than students who sleep less. Half of the students sleep eight to nine hours the night before the exam. The other half sleep only four to five hours the night before the test. She then gives the participants an exam. In this experiment, what is the dependent variable?

a. The group that sleeps eight to nine hours b. The performance on the exam c. The group that sleeps four to five hours d. Whether they slept four to five or eight or nine hours