Why it matters
Keeps research useful outside the lab or sample.
Core term · Donald T. Campbell
External Validity
The degree to which findings generalize beyond the specific study context.
Areas of life
Product designtherapypolicyeducation
How to handle it
Test ideas across different people, settings and times.
Who shaped this idea
The thinker behind it
From concept to practice
Turn External Validity into a question you can answer.
Psipas asks you one small, honest question at a time — and builds the picture from your answers.