تحليل الفئات الكامنة لاختبار تيمس الرياضيات للصف الثامن في السعودية وسنغافورة
This study aimed to find out the number of latent classes and the number of individuals in each latent class for the performance of eighth-grade students on the 2019 TIMSS Mathematics Test in Saudi Arabia compared to Singapore and to find out the accuracy of the classification of latent classes in Saudi Arabia compared to Singapore. The study sample consisted of (404) male and female students from the Kingdom of Saudi Arabia, and (350) male and female students from Singapore. The results of the Saudi data showed that the two latent class model is the optimal model. The results also showed that most individuals fall within the first class, as the percentage reached 90%. A small number fall within the second class, representing 1% of the sample individuals. The results of the Singapore data showed that the three-latent class model is the optimal model and that the number of individuals within the first class is equal to the number of individuals within the second class, as the percentage reached (40%) for both. The rate of (20%) of the sample individuals fell within the third class. The results showed that the accuracy of classification of latent classes for eighth-grade students’ performance in the optimal model for Saudi Arabia reached a value of 0.929, which is considered a good value, while in the optimal model for Singapore, the value reached 0.769, which is an acceptable value. (Published abstract)