Why is this an example of quasi-experimental design and not an experimental design? Explain your answer. Identify the internal threats to validity that may be an issue in this study. Explain your answer.

Describe the treatment and control groups used in this study.
Why is this an example of quasi-experimental design and not an experimental design? Explain your answer.
Identify the internal threats to validity that may be an issue in this study. Explain your answer.

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