51) In a study on alcohol and aggressive behaviour, subjects are randomly assigned to one of two groups. One group receives real alcohol while the other group receives tonic water that tastes identical to real alcohol. In this way, neither group of subjects knows who got the real alcohol. In this study, the non-alcoholic tonic water serves as a(n) ________. A) selection factor B) dependent variable C) independent variable D) placebo 52) In a study on alcohol and aggressive behaviour, subjects are randomly assigned to one of two groups. One group receives real alcohol while the other group receives tonic water that tastes identical to real alcohol. Although the researchers know which group got the real alcohol, none of the subjects know. This study is designed as a ________ study. A) single-blind B) double-blind C) longitudinal D) correlational 53) In a study on alcohol and aggressive behaviour, subjects are randomly assigned to one of two groups. One group receives real alcohol while the other group receives tonic water that tastes identical to real alcohol. Neither the subjects nor the researchers know which group got the real alcohol until after the study is completed. This study is designed as a ________ study. A) single-blind B) double-blind C) longitudinal D) correlational 54) In a study on alcohol and aggressive behaviour, subjects are randomly assigned to one of two groups. One group receives real alcohol while the other group receives tonic water that tastes identical to real alcohol. In this study, the non-alcoholic tonic water is a(n) ________ placebo. A) response B) inert C) blind D) attention 55) Single-blind experiments control for ________. A) neither subjects’ nor experimenters’ expectations B) subjects’ but not experimenters’ expectations C) experimenters’ but not subjects’ expectations D) both subjects’ and experimenters’ expectations 56) Double-blind studies control for ________. A) neither subjects’ nor experimenters’ expectations B) subjects’ but not experimenters’ expectations C) experimenters’ but not subjects’ expectations D) both subjects’ and experimenters’ expectations 57) In a study on psychotherapy techniques, subjects are randomly assigned to one of two groups. One group receives a specific type of therapy. The other group receives a credible treatment that has elements common to all therapies but no specific ingredients of the therapy received by the first group. This generic placebo therapy received by the second group is called a(n) ________ placebo. A) response B) inert C) blind D) attention 58) Attention placebos control for ________. A) neither subjects’ nor experimenters’ expectations B) subjects’ but not experimenters’ expectations C) experimenters’ but not subjects’ expectations D) both subjects’ and experimenters’ expectations 59) Studies that examine the rates of occurrence of abnormal behaviour in various settings and population groups are known as ________ studies. A) epidemiological B) quasi-experimental C) case D) psychometric 60) A survey is an example of a(n) ________ study. A) epidemiological B) quasi-experimental C) case D) psychometric