Kılıç, Abdullah FarukUysal, İbrahim2023-09-142023-09-142022Kılıç, A. F. & Uysal, İ. (2022). To what extent are item discrimination values realistic? A new index for two-dimensional structures . International Journal of Assessment Tools in Education , 9 (3) , 728-740 . DOI: 10.21449/ijate.10987572148-7456http://dx.doi.org/10.21449/ijate.1098757https://hdl.handle.net/20.500.12491/11698Most researchers investigate the corrected item-total correlation of items when analyzing item discrimination in multi-dimensional structures under the Classical Test Theory, which might lead to underestimating item discrimination, thereby removing items from the test. Researchers might investigate the corrected item-total correlation with the factors to which that item belongs; however, getting a general overview of the entire test is impossible. Based on this problem, this study aims to recommend a new index to investigate item discrimination in two-dimensional structures through a Monte Carlo simulation. The new item discrimination index is evaluated by identifying sample size, item discrimination value, inter-factor correlation, and the number of categories. Based upon the results of the study it can be claimed that the proposed item discrimination index proves acceptable performance for two-dimensional structures. Accordingly, using this new item discrimination index could be recommended to researchers when investigating item discrimination in two-dimensional structures.eninfo:eu-repo/semantics/openAccessItem DiscriminationMulti-DimensionalStructuresClassical Test TheoryCorrected Item-TotalCorrelationArticle10.21449/ijate.1098757937287401121746WOS:000865587500011N/A