2023 Volume 19 Issue 1 Pages 1-22
A model of a pairwise comparison type test using item response theory is proposed and analyzed using data from a recruitment test. First, we estimated the discriminative power, threshold, and social desirability, which are the population numbers that define the model. Next, cross-validation of the estimates was conducted using data different from those at the time of estimation, and it was confirmed that the estimates were sufficiently stable. The questions about social desirability were shown to be valid. The obtained constant was treated as a fixed parameter and the scale value was estimated. Comparison of the obtained estimates with the test scores obtained by addition and subtraction confirmed that there was a high correlation between the two. In addition, a theoretical test characteristic curve was constructed with the obtained fixed population as a given, and a numerical test characteristic curve was constructed using another set of data, and the two were compared. The results showed that the two were generally in agreement, indicating the high prediction accuracy of the theoretical test characteristic curve.
