A researcher designed an experiment to determine if consumption of caffeine results in increased level of motor activity. In this study, the dependent variable is the

What explains why the instructor pilots believed that praise hurt and punishment

helped? (a) they thought the student pilots resented the praise but expected the criticism (b) the student pilots told them that they learned more from the criticism (c) when they were criticized, the student pilots told the instructor pilots that they would show the instructor pilots that they could do the job (d) regression to the mean

Which of the following individuals has the greatest risk for bearing a child with trisomy 21?

A) Mrs. Jones, who is 18 and has been addicted to drugs B) Mrs. Black, age 45 C) Mrs. Garcia, age 30, who had in vitro fertilization D) Mrs. Wallace, age 27, who is having her seventh child