An automobile plant plans to implement a new assembly procedure throughout the plant in order to increase productivity. To find out whether the new procedure is better than the old, management plans to compare weekly productivity over the last six months before the change with the first six months after the change. What type of quasi-experimental design is illustrated in this example?
A) interrupted time series
B) delayed control group
C) regression discontinuity
D) repeated treatment

Question

Quizplus · Accepted Answer

The example described uses an interrupted time series design, where the treatment (new assembly procedure) is implemented at a specific point in time and the outcome (productivity) is measured before and after the intervention. There is no control group, so option B is incorrect. Regression discontinuity and repeated treatment designs involve different types of manipulations and measurements than what is described in this example.

An Automobile Plant Plans to Implement a New Assembly Procedure