This paper put forward a general approach to measure testvalidity.
该文提出了计量测验效度的一种统一方法。
2
Zheng Ying: testvalidity and security are very important features of a test.
郑英：考试的有效性与安全性是非常重要的因素。
3
An analysis of formulas is made based on classical testing theories and a new formula is put forward to explain the relationship between testvalidity and test length.