Dr. Baxter conducts an experiment investigating the effectiveness of a new antacid on reducing stomach pain. He recruits 100 chronic sufferers of acid indigestion, and places them in four groups, each receiving a different amount of medication
The first group receives a sham pill because it contains none of the new antacid whatsoever. He is very surprised, however, when he finds that group one reports a statistically significant reduction in stomach pain after taking their pill. Which of the following best explains why the participants in group one showed a response to the pill, even when it had no active ingredient?
a. The subject-expectancy effect
b. Demand characteristics
c. The placebo effect
d. The observer-expectancy effect
Answer: C
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A psychologist gives the same test to a client twice. The tests are separated by six days. If the test results are quite dissimilar, we could say that the test has weak ____
a. test-retest reliability c. internal consistency b. interrater reliability d. predictive validity
Babies who exhibit avoidant attachment are not upset when their mothers leave the room
a. True b. False Indicate whether the statement is true or false