How has the median age of first marriage in the United States changed since 1970?
A. It has dropped by about four years.
B. It has remained constant.
C. It has risen by about four years.
D. It has risen by about eight years.
Answer: C. It has risen by about four years.
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Which type of treatment is a strong research-supported psychological treatment for specific phobia?
a. ?exposure therapy b. ?social skills training c. ?stress inoculation d. ?applied relaxation
In a punch-card hand recount, suppose that various election officials disagree among themselves about whether particular ballots contain real votes in their "dimpled chads.". Their rating system is weak in
a. interrater reliability. b. temporal stability. c. confidentiality. d. random assignment.
The descriptors "positive" and "negative," when used in reference to reinforcers, are synonyms for
a. "add" and "remove." b. "conditioned" and "unconditioned." c. "increase" and "decrease." d. "voluntary" and "involuntary." e. "new" and "familiar."
An echo usually stays in the sensory registers for ________
a. one second b. several seconds c. 40 seconds d. 1/4 of a second