Ali, a war veteran, has had nightmares, flashbacks, and anxiety attacks for the past three years. Ali is most likely suffering from _______________
a) acute stress disorder
b) external locus of control
c) catastrophic stress
d) post-traumatic stress disorder (PTSD)
ANS: d
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Which of the following research designs allows researchers the MOST control over the variables they are studying?
a. Quasi-experiments b. Laboratory experiments c. Field experiments d. Correlational studies
In a summary judgment
A. the judge lets expert witnesses decide the case rather than a jury. B. a trial is avoided; the judge rules after evaluating the evidence. C. the jury makes a judgment based on a summary of the case by the judge. D. the jury supplements its verdict by giving the reasons, in writing, for it.
When designing a cross-sectional study with different age groups, a researcher is concerned
that cohort differences may influence his study results. To ease his mind, he ensures that the oldest participants ( age 80 ) are similar in intelligence, education, and social class to the younger participants. What is the researcher's primary concern? A) The older participants may not be representative of the same-aged people in the community. B) He relied on a nonprobability or convenience sample. C) It is very difficult to measure intelligence in older people. D) He should not have relied on a chain sampling method.
A professor conducts a study on tipping behavior in restaurants and hotels, which is designed to determine whether factors such as posture and communication influence tips left by customers. He conducts this study based on his experience of working at a restaurant when he was young. From this scenario, it can be inferred that the initial idea for the professor's study stems from
A. a practical problem. B. a scientific theory. C. his observation of an actual event. D. past research.