In Campbell and Ross's analysis of the effect of the Connecticut crackdown on speeding, they were able to eliminate the threat of history by using a __________ design, which showed that the same decline in traffic fatalities did not occur in four neighboring states.
A) separate-sample pretest-posttest
B) nonequivalent control group
C) interrupted time-series
D) multiple time-series

Question

Quizplus · Accepted Answer

The interrupted time-series design is used to eliminate the threat of history by comparing the data from the experimental group to the data from a control group that was not exposed to the intervention. In this case, the control group was the four neighboring states that did not experience the same decline in traffic fatalities.

In Campbell and Ross's Analysis of the Effect of the Connecticut