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The objective of this research was to compare classification accuracy and classification consistency of the DINA model and the DINO model under different conditions. Data were generated by using Monte Carlo technique under 150 conditions consisting of: (1) test lengths included 4, 8, 12, 20 and 40 items; (2) six sample sizes containing 10, 25, 50, 100, 200 and 500 units; (3) five levels of percentage of multidimensionality, which were 0, 25, 50, 75 and 100 percentages; and (4) three attributes to be measured. Each condition was repeated 1,000 times. The data was simulated and assessed with R program.
The research results were: (1) there were statistically significant differences in classification accuracy and classification consistency of the DINA model and the DINO model based on the test lengths; (2) there were no statistically significant differences in classification accuracy and classification consistency of the DINA model and the DINO model based on the sample sizes; (3) there were statistically significant differences in classification accuracy and classification consistency of the DINA model and the DINO model based on the percentages of multidimensionality. In terms of practical recommendations, teachers and educational personnel should select 8 – 12 items and 25 – 50 percent of multidimensional measurement for the DINA model or the DINO model when they are used.
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