January 28th, 2020 
After reading the assigned chapters, imagine you are working for a program that treats individuals with anxiety. Select a group design that could be used to evaluate the effectiveness of the program. Justify why you selected the design. After selecting and justifying the design, identifying and discuss three internal threats to validity that could influence the outcome of the evaluation. Reading Assignments: Chapter 8: Sampling and Chapter 9: Group Research Designs.
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