1. Which of the following is an example of a non-directional research hypothesis? a. The use of a particular drug will increase a subject's IQ score. b. Less sleep will decrease a subject's score on a memory test. c. The use of colored filters will change a subject's perception of depth. d. Children who attend preschool will have better social skills than those who do not attend preschool. e. Men are more aggressive than women. 2. Kinsleigh is doing a research experiment to determine whether the amount of time a person spends reading affects their SAT score. After a few of the subjects come to the lab and read for a certain amount of time, one of Kinsleigh's lamps burns out and therefore makes the lab much darker for the rest of the subjects. In this example, the amount of light is considered what type of variable? a. Independent variable b. Dependent variable c. Demand variable d. Extraneous variable e. Subject variable 3. Based on a sample of 5 charts, a nurse supervisor has come to the conclusion that the nurses on her floor are making too many mistakes in charting. In other words, she determines that the mean percentage of mistakes is higher than the minimal acceptable level of 2% errors. However, the other 902 charts, which she did not consider, are perfect. What type of mistake is it likely that she has made? a. Type I error b. Type II error c. Type III error d. Power e. Standard error of the mean 4. An independent samples t test is appropriate for analyzing data from a design using levels of the independent variable. a. Within-subjects; two b. Within-subjects; three or more c. Between-subjects; two d. Between-subjects; three or more e. Both c or d can be correct