1. Explain the differences between the experimental, quasi-experimental and non-experimental research strategies 
2. Give an overview of a research strategy of your choice and argue why it is important to have one.
3. Lastly, explain how you are going to ensure that your research proposal possesses proper external validity (i.e. its results are generalizable in a wider context of the phenomena in question) and the internal validity (i.e. the correlation between your variables) (pp. 166-169).
4. Please, make sure to include citations and references using APA style guidelines.
5. Please, keep the length of your submissions to 3-4 pages, double-spaced.