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A researcher measures community well-being via surveys in March 2024 (pre) and March 2025 (post) to evaluate a community development program launched in June 2024. Well-being scores increased significantly.
However, during this period, a major employer expanded operations and hired 500 new local workers.
Which validity threat is most relevant?
A researcher measures community well-being via surveys in March 2024 (pre) and March 2025 (post) to evaluate a community development program launched in June 2024. Well-being scores increased significantly.
However, during this period, a major employer expanded operations and hired 500 new local workers.
Which validity threat is most relevant?