Marty is at the park with his friends. They want to build a seesaw they can use. Every time Marty chooses a board, he moves the stone fulcrum and changes the number of people on the seesaw. Marty is most likely
a. using hypothetical-deductive reasoning.
b. a preoperational thinker.
c. a concrete operational thinker.
d. going to be a construction worker when he grows up.
Answer: c.
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The average duration of depressive episodes is about
a. 7 to 14 days. b. 4 to 6 weeks. c. 1 year. d. 6 months.
Which of the following best describes giving a dog food after rolling over?
a. A negative, primary, immediate reinforcer was given. b. A positive, secondary, immediate reinforcer was given. c. A positive, primary, immediate reinforcer was given. d. A negative, primary, delayed reinforcer was given.
Which of the following characteristics of asynchronous growth violates the concept of cephalocaudal development?
a. Arms and legs mature before hands and feet. b. Hands and feet mature before arms and legs. c. Legs reach peak growth before shoulders and chest. d. Shoulders and chest reach peak growth before legs.
Researchers on obesity agree that during middle age:
a. every extra pound is a health hazard. b. it is okay to be overweight as long as one is not obese. c. metabolism slows down by about a third. d. adults need to consume more calories than emerging adults do.