Which of the following correlations represents the weakest degree of relation between two variables?
A) Daily calcium intake and bone mass density, r = +.11
B) Degree of exposure to lead and IQ scores in children, r = –.12
C) Hours of exposure to media violence and aggressive behavior, r = +.31
D) Number of cigarettes smoked per day and incidence of lung cancer, r = +.39
Answer: A
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Extrapolating from the cultural life script hypothesis, which of the following events would be easiest to recall?
A. Retiring from work at age 40 B. Marrying at age 60 C. Graduating from college at age 22 D. Having a child at age 45
In a study of effects of alcohol on driving ability, the control group should be given
a. a high dosage of alcohol. b. one-half the dosage given the experimental group. c. a driving test before and after drinking alcohol. d. no alcohol at all.
When is a one-tailed test used?
a. When no relationship is predicted b. When a relationship is predicted and the direction in which the scores will change is predicted c. When the demonstrated relationship is predicted d. When a relationship is predicted without stating the direction in which the scores will change
The middle phase of treatment in basic family therapy is devoted to helping families deal more ____________ with each other.
a. constructively b. correctly c. equally d. none of the above