A randomized matched subjects, control group design is beneficial when
a. small samples are to be used in the study.
a.
b. classrooms are randomly assigned to different treatments.
c. subjects are exposed to more than one treatment.
d. the regression effect is likely to be a threat.
Question 2
In the following scenarios, indicate whether the researcher is investigating validity or reliability: a.A researcher developed a measure of achievement motivation and then compared students judged to have high need to achieve with students judged with low need to achieve to see if they performed differently on the motivation measure. b.A researcher administered a test to a sample of students. He administered the same test six weeks later and correlated the results of the two administrations. c.A researcher administered a test of teaching ability to a group of graduating college seniors in a school of education and then at the end of their first year of teaching correlated their test scores with principals' ratings of their teaching effectiveness. He found a moderate correlation.
What will be an ideal response?
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