1 = female
2 = male

1 = 20-29
2 = 30-39
3 = 40-49
4 = 50-59
5 = 60+

1 = Italian
2 = other

1 = compulsory
2 = Language School
3 = University
4 = CPIA

1 = Mai
2 = Quasi_mai
3 = Qualche_volta
4 = Spesso
5 = Sempre

1 = Fortemente_disaccordo
2 = Disaccordo
3 = debolmente_disaccordo
4 = Neutro
5 = Debolmente_accordo
6 = Accordo
7 = Fortemente_accordo

1 = Fortemente_disaccordo
2 = Disaccordo
3 = Neutro
4 = Accordo
5 = Fortemente_accordo

residence
1 = Italy
2 = Turkey
3 = Germany
4 = other