The common discovery in cross-validation research that a test predicts the relevant criterion less accurately with the new sample of examinees than with original tryout sample.

• 在交叉效度研究常見現象，測驗對相關效標的預測度，新的受試樣本的正確性比原始測試樣本低，即因樣本不同，而產生的效度變小的現象。