How do the interrupted time-series designs and replicated time-series designs differ? Why is the replicated design more methodologically sound?
What will be an ideal response?
The interrupted time-series design involves a single group that is observed multiple times over the course of the study. The replicated design includes more than one group, so researchers can make comparisons of changes over time across groups. In addition, in the replicated design, the treatment can be applied to different groups at different times, increasing our confidence that the threats to internal validity like history, maturation, testing, or statistical regression (regression to the mean).
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Xavier was a member of the Texas Grange. Which of the following was he likely to believe?
a. The railroad companies were responsible for the declining fortunes of Texan farmers. b. African Americans should play a greater part in government and policymaking. c. Government spending on social service and rural betterment should be doubled. d. The splitting Texas into East and West Texas would result in more effective policymaking.
The Cable News Network broadcasts news for a. 8 hours per day
b. 12 hours per day. c. 16 hours per day. d. 24 hours per day.