⊿ Point. {R} Glossary. ◢ Keyword: E. ◥ University. {q} PhD. {tr} Training. ⚫ UK. ↂ EndNote. ☝️ Weerakkody. External validity. Extent to which the results of a study can be generalized External validity is the validity of applying the conclusions of a scientific study outside the context of that study.[1] In other words, it is the extent to which the results of a study can be generalized to and across other situations, people, stimuli, and times.[2] In contrast, internal validity is the validity of conclusions drawn within the context of a particular study. Because general conclusions are almost always a goal in research, external validity is an important property of any study. Mathematical analysis of external validity concerns a determination of whether generalization across heterogeneous populations is feasible, and devising statistical and computational methods that produce valid generalizations.[3] Threats[edit] Aptitude by treatment interaction: The sample may have certain features that interact with the independent variable, limiting generalizability.
Disarming threats[edit] Examples[edit] Replications[edit]