Key Takeaways

• Different study designs can produce different patterns of results.  

• A mixed study design, that includes pre and post testing and a comparison group, can produce more complex patterns of results including interactions between multiple factors.

• Explore your study design to decide which patterns of results are possible and what you would do with those results should they occur. 

• Data collection is iterative—results should be tested again to confirm patterns. Retesting results builds confidence in program evaluation findings.