Using classical test theory and item response theory, this study applied sequential procedures to a real operational item pool in a variable-length computerized adaptive testing (CAT) to detect items whose security may be compromised. Moreover, this study proposed a hybrid threshold approach to improve the detection power of the sequential…

The ability of respondents to properly execute Thurstone scaling procedures as opposed to Likert scaling procedures was investigated in a sample of high school students. Results indicate difficulty among respondents using Thurstone-type instructions to resist giving Likert-type responses. (JKS)