An urban community clinic wants to try a new method of getting drug addicts to kick their addiction. They advertise for participants in their lobby, and allow volunteers to choose to participate either in the treatment or control group.
Three months later, they find that 65 of the volunteers are off drugs. This example illustrates the possibility of ________________ as a plausible rival hypothesis.
a. history
b. maturation
c. regression artifact
d. selection
Question 2
Which of the following might you find in the Annual Review of Psychology?
a. a report on one recent research project examining the relationship between poverty and 4th grade reading ability
b. the abstracts of journal articles on concept formation published in the past 12 months
c. an in-depth discussion of last year's major journal articles on the relationship between medication and attention deficit hyperactivity disorder
d. a list of all articles on psychology published in the last year, arranged by topic
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