Table of contentsTrade-off between internal and external validityThreats to internal validityThreats to external validityOther interesting articlesInternal and external validity are two ways of testing cause-and-effect relationships. Internal validity refers to the degree of confidence that the causal relationship being tested is trustworthy and not influenced by other factors or variables.External validity refers to the extent … Continue reading Internal vs. External Validity | Understanding Differences & Threats