Whether to use tests, other kinds of information, or both in a particular situation depends, therefore, upon the evidence from experience concerning comparative validity and up49 eon such factors as cost and availability.

• 译文：因此，究竟是使用测试，其它种类的信息，还是在特定的情况下两者都使用，取决于关于相对效度的来自经验的证据，同时还取决于成本和可获得性这样的因素。