绿州
发表于 2025-3-30 11:02:01
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丰富
发表于 2025-3-30 12:26:42
Anschluss, Ausschluss, Kontrolle,between those who respond to your survey and the ones who do not, while the latter is to check if your participants respond to substances in the questions or mainly to the instrument. It is like testing the performance of your car – does the variations in speed is affected by the fuel types you put
Regurgitation
发表于 2025-3-30 17:25:58
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