在以線性轉換為基礎之試卷等化方法中，配對兩試卷之特徵曲線法（Characteristic Curve Method, CCM,乃經常被採用，過去此種試卷等化方法大多僅應用於兩點（dichotomous）或多點（polytomous）計分之試題上由於近年來混合式試卷（編輯部分兩點計分及部分多點計分之試題）已普遍被採用，因此如何延展CCM之等化方法至此種混合式試卷，將在文中加以介紹與闡釋。此外，本文並提供詳細之估算原理與程序作為研究參考。

　　　　　Among the common-item linking methods by a linear transformation procedure, the characteristic curve method (CCM) which matches the test characteristic curves between the base and the equated tests (Stocking & Lord, 1983) is the most widely adopted approach to estimating the equating coefficients either for dichotomously or polytomously scored items. Since recent years have seen growing use of a test with mixed item formats, e.g., partly containing dichotomous scored items and partly consisting of polytomous scored items, the extension of the CCM approach to mixed-format tests is illustrated in this paper. The corresponding CCM's algorithms for finding equating coefficients for mixed-format tests is provided.