Table 1.

Descriptive data of test scores within subject groups

Groups	M (SD)	Cohen’s d and % difference compared to 0F group
Language
3F group (n = 37,363)	55.3 ± 19.1	0.20; 7.6%
2F group (n = 46,278)	53.7 ± 19.2	0.12; 4.5%
F3 group (n = 24,868)	53.3 ± 19.2	0.10; 3.7%
1F group (n = 51,203)	52.2 ± 19.2	0.04; 1.6%
0F group (n = 222,547)	51.4 ± 19.2	–
Foreign language
3F group (n = 37,363)	56.3 ± 23.4	0.21; 9.5%
2F group (n = 46,278)	54.3 ± 23.7	0.12; 5.6%
F3 group (n = 24,868)	53.7 ± 23.6	0.10; 4.5%
1F group (n = 51,203)	52.6 ± 23.7	0.05; 2.3%
0F group (222547)	51.4 ± 23.7	–
Math
3F group (n = 37,363)	56.5 ± 19.5	0.29; 11.2%
2F group (n = 46,278)	54.4 ± 19.7	0.18; 7.1%
F3 group (n = 24,868)	53.7 ± 19.5	0.15; 5.7%
1F group (n = 51,203)	52.3 ± 19.8	0.08; 3.0%
0F group (222547)	50.8 ± 19.8	–
Social Science
3F group (n = 37,363)	56.3 ± 20.9	0.24; 10.0%
2F group (n = 46,278)	54.3 ± 21.2	0.15; 6.1%
F3 group (n = 24,868)	54.0 ± 21.0	0.13; 5.5%
1F group (n = 51,203)	52.4 ± 21.2	0.06; 2.3%
0F group (222547)	51.2 ± 21.0	–
Science
3F group (n = 37,363)	56.3 ± 18.8	0.30; 10.8%
2F group (n = 46,278)	54.3 ± 18.8	0.19; 6.9%
F3 group (n = 24,868)	53.7 ± 18.7	0.16; 5.7%
1F group (n = 51,203)	52.2 ± 18.7	0.08; 2.8%
0F group (n = 222,547)	50.8 ± 18.5	–