Threats to Internal Validity Explained
In this video, we break down the major threats to internal validity in research and evaluation. Internal validity refers to the confidence that observed effects are actually caused by the intervention.
What's Covered
- What internal validity means and why it matters
- Major threats: history, maturation, testing, instrumentation, regression to the mean
- Selection bias, attrition, and diffusion of treatment
- How to minimize threats to internal validity
- Key exam scenarios involving internal validity threats