SOLVED

7-11) If researchers are concerned about a placebo effect in their research, one strategy they can make use of is the placebo a. control group. b. dependent variable. c. confound. d. main effect. 7-12) Suppose a researcher is conducting a study that uses biofeedback to monitor subjects’ heart rates and subjects are asked to rate their perceived stress levels. In one condition, subjects listen to their actual heart rates while they rate their stress levels. In the other condition, different subjects listen to a tape recording of a fabricated heart rate and, again, rate their perceived stress. The second condition in this study represents a. regression to the mean. b. an interaction effect. c. a placebo control group. d. the Hawthorne effect. 7-13) In drug studies that use placebo control groups, researchers often keep the administration of the actual treatment hidden from both the experimenter and the subject. This control strategy is referred to as a a. Hawthorne effect. b. double-blind procedure. c. factorial design. d. multiple regression technique. 7-14) In a __________ design, subjects in the control group and experimental group are paired and tested simultaneously such that both groups experience the same events at exactly the same time. a. yoked control b. factorial c. naturalistic observational d. correlational 7-15) In independent groups designs, when precise timing of events between the experimental and control groups is critical, the __________ design is the preferred technique. a. yoked control b. factorial c. repeated measures d. quasi-experimental 7-16) A __________ control group addresses the ethical issue of withholding a potentially beneficial treatment from one group and not the other in that both groups, eventually, will receive the treatment. a. yoked b. factorial c. delayed d. waiting list 7-17) If an independent groups design contains one independent variable with five levels, the design is considered a a. single-level, single-factor study. b. multi-level, single-factor study. c. single-level, multi-factor study. d. multi-level, multi-factor study. 7-18) With independent-groups experiments, researchers often use multi-level designs because, 1) these designs allow for the testing of nonlinear relationships between the independent and dependent variables, and 2) a. these designs allow the researcher to more clearly and definitively test the hypothesis. b. these designs are simpler, and take less effort compared to two-group designs. c. these designs are typically less expensive than two-group designs. d. these designs provide less data for the researcher to interpret. 7-19) Suppose a researcher is designing a study and has reason to believe that the relationship between the independent and dependent variables follows an inverted-U pattern. In choosing levels of the independent variable, the researcher should probably choose a. one level that represents the predicted high point of the pattern. b. one level that represents the predicted average of the pattern. c. two levels that represent the predicted high and low points of the pattern. d. three levels that represent the predicted high, medium, and low points of the pattern. 7-20) When designing independent-groups experiments, researchers typically try to create the most efficient designs possible – that is, they attempt to use the __________ design that will test the research hypothesis clearly and completely. a. most complex b. most expensive c. largest d. simplest