Design a study using a quasi-experimental design to test the hypothesis that when people are in a good mood, they are more likely to contribute to a charitable cause. Identify the independent and dependent variables. Include procedures for mitigating threats to the internal validity of the study.

Use the source below for more information on quasi-experimental design and cite appropriately (use both in-text citations as well as reference page).

Source: Christensen, L. B., Johnson, R. B., & Turner, L. A. (2020). Research Methods, Design, and Analysis (13th ed.). New York, NY: Pearson.