Which of the following is used in experiments, but not in the correlational method?
a. measurement of a variable such as how aggressive or how helpful people are
b. systematically manipulating the situation
c. representative sampling of people from a population
d. surveys
Answer: B
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Moira checks her weight several times a day. One evening she steps on her bathroom scale and she is surprised when it is 6 pounds higher than her mid-day weigh-in. She steps on the scale again, but this time the weight is 2 pounds less
Puzzled, she steps on the scale again, only to find that she is 5 pounds lighter! Which of the following statements is true with regard to Moira's scale? a. It lacks face validity b. It lacks criterion validity c. It lacks internal validity d. It lacks reliability
Olga's parents are warm, reasonably demanding, and committed to the value of education. It is most likely that Olga
A) will choose friends who have a positive attitude toward school and achievement. B) will rebel by slacking off on schoolwork. C) will become deeply anxious about possibly failing. D) All of the above are equally likely.