Methods and Results for application of the quantile equating method to data from 1 H-NMR analysis of urine samples. For plasma LC-MS and 1 H-NMR data, PC1–PC2 loadings plots and lists with variables having lowest B1–B2 correlation of quantile values before equating. Typical examples of plasma 1 H-NMR spectra.

this study investigated the utility of all of the above (aota) as a test option in multiple-choice items. it aimed at estimating item fit, item difficulty, item discrimination, and guess factor of such a choice. five reading passages of the key english test (ket, 2010) were adapted. the test was reconstructed in 2 parallel forms: test 1 did not include the abovementioned alternative, whereas te...

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There is a need for brief and non-intrusive measures to identify common mental disorder (CMD) in worker populations. The primary aim of this study was determine whether workers reporting CMD symptoms indicative minor psychiatric morbidity could be reliably identified by single-item job stressfulness measure (SIJSM). A secondary the number response categories required maximize sensitivity specif...

In forced-choice questionnaires, respondents have to make choices between two or more items presented at the same time. Several IRT models have been developed to link respondent choices to underlying psychological attributes, including the recent MUPP (Stark et al. in Appl Psychol Meas 29:184-203, 2005) and Thurstonian IRT (Brown and Maydeu-Olivares in Educ Psychol Meas 71:460-502, 2011) models...

A constrained computerized adaptive testing (CAT) algorithm is presented that automatically equates the number-correct scores on adaptive tests. The algorithm can be used to equate number-correct scores across different administrations of the same adaptive test as well as to an external reference test. The constraints are derived from a set of conditions on item response functions that guarante...