The heterogeneity factor had a nega

The heterogeneity factor had a negative effect on the achievement of the
students. The students in the mixed ability classes scored less than the
students in other groups. However,
when the “same ability” groups
contained students from different cultural backgrounds, the results were
the most favorable.

Hasil (Bahasa Indonesia) 2:

Faktor heterogenitas memiliki efek negatif pada pencapaian
siswa. Para siswa di kelas kemampuan campuran mencetak kurang dari
siswa dalam kelompok lain. Namun,
ketika "sama kemampuan" kelompok
terdapat siswa dari latar belakang budaya yang berbeda, hasilnya
paling menguntungkan.