The test of civic knowledge involved 20 items out of which 13 aimed at exploring the
students’ knowledge and skills related to the political system and the legal system and 7
referred to the framework of interpreting political information. The involved contents of the
measurement reflected on fields of knowledge that relies heavily on the students’ everyday
experiences regarding societal phenomena and knowledge from other non-school-related
sources. Since every student filled in the same instruments, our data allowed direct
comparison of the sub-samples according to grades and school types. The reliability indices of
the instrument were acceptable in case of both grades (Cronbach’s α was 0.73 in grade 7 and
0.77 in grade 11).