Which validity concerns the degree to which findings can be generalized over time?

Which validity concerns the degree to which findings can be generalized over time?

• A. Historical validity
• B. External validity
• C. Internal validity
• D. Ecological validity

Answer: (A)

Temporal generalizability is the main idea here. Historical validity refers to whether findings would hold in different historical contexts, accounting for era-specific factors that could change outcomes—things like shifts in culture, technology, or diagnostic criteria. If a treatment works in one decade, historical validity asks whether that same effect would be seen in a later decade when conditions have changed. This is distinct from internal validity, which focuses on causal claims within the study, and from ecological or broader external validity, which concern applying results to real-world settings or other populations. So for questions about generalizing findings over time, historical validity is the best fit.

Temporal generalizability is the main idea here. Historical validity refers to whether findings would hold in different historical contexts, accounting for era-specific factors that could change outcomes—things like shifts in culture, technology, or diagnostic criteria. If a treatment works in one decade, historical validity asks whether that same effect would be seen in a later decade when conditions have changed. This is distinct from internal validity, which focuses on causal claims within the study, and from ecological or broader external validity, which concern applying results to real-world settings or other populations. So for questions about generalizing findings over time, historical validity is the best fit.