In a research study, a psychiatrist gives depressed patients a particular drug and observes that their symptoms diminish. He concludes that the drug caused the reduction in symptoms. This experiment is flawed because it lacks ______
a. an independent variable
b. a dependent variable
c. a control group
d. an explanation for why the drug worked
a
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Which of the following is a similarity between literature reviews and meta-analyses?
A. Both primarily focus on the internal validity of a research. B. Both tell the reader about the findings that are strongly or weakly supported in the literature. C. Both allow statistical, quantitative conclusions. D. Both begin with a body of previous research on a topic.
The deficits that low birth weight infants endure correspond closely to the infant's ______.
A. gestational age B. sex C. size at delivery D. ethnicity
The synthetic opioid that blocks the effects of heroin by binding to the same receptor sites in the central nervous system is
A. psilocybin. B. methadone. C. cocaine. D. peyote.
A researcher wants to test the assertion that in comparison to female politicians, male politicians in the 20th century were involved in more number of fraud cases. Which will be the most suitable observation method in this scenario?
A. survey B. naturalistic observation C. archival research D. field experiment