Internal Validity

In this video I explain the concept of internal validity and how it acts as a checklist for considering whether an independent variable has been effectively manipulated, a dependent variable has been measured without bias, and a clear pattern can be found in the data. I also mention the importance of avoiding simple yes/no answers and remembering that all of … Read More

Populations and Samples

In this video I explain populations and samples, including random sampling, opportunity samples, stratified sampling, and issues related to representativeness. Don’t forget to subscribe to the channel to see future videos! Have questions or topics you’d like to see covered in a future video? Let me know by commenting or sending me an email!  Need more explanation? Check out my … Read More