Evaluation Designs - Time Series

Common Evaluation Designs

Time Series Design

A variation of the pretest/posttest design, this design collects data over regular intervals of time and aims to assess an intervention/program before, during, and after it concludes. A time-series design may integrate a control or comparison group. If so, it may more closely resemble a quasi-experimental or experimental design.


Time-Series Design in Practice

A program wishes to examine motivation levels in their empowerment course to see if participants who attend the course (intervention) will increase their levels of motivation. They develop a survey to assess motivation levels. The survey was administered once before the program (pretest), three months after the program (test), six months after the program (test), and finally at the end of one year following the conclusion of the program (posttest). The test scores at different time points are analyzed to look at the overall effect of the program.

time series design



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