Effects of Ability Grouping on Students Attitudes toward Korean and English

The study aimed to investigate the effects of ability grouping in Korean and English on studentsacademic performances and their attitudes toward subjects. A multiple group analysis with a 2-level HLM was performed on large-scale data using SAS, R, Mplus, and HLM for comparison. The study showed that the effects of ability grouping on student academic achievement and student perception about curricula were ambiguous. The study also showed that Mplus and HLM produced larger standard errors of the parameter estimates than SAS and R