In 2016 alone, ________ million people over the age of 12 misused these drugs, a prevalence of over ________ percent.
A. 11.5; 4
B. 18.7; 8
C. 14.2; 5
D. 9; 3
Answer: A
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Suppose Maria's mental age is 20 and her chronological age is 10. What is her IQ?
a) 320 b) 80 c) 200 d) 100
Researchers turn to correlational studies when
a. large groups of participants are involved. b. they are certain that participants can remember accurately what happened to them earlier. c. variables of interest cannot be altered by the researchers. d. communication with participants may be a problem. e. their hypotheses are causal in nature.
Elementary school children in the U.S. grow, on average, ________ a year
a) 2 to 3 inches b) 4 to 5 inches c) 1 to 2 inches d) 3 to 4 inches
Variations in room temperature or noise level, aversive odors in the lab space, and poor lighting are examples of ________ variables
a) nuisanc b) extraneous c) independent d) dependent