technical ICTskills [ F(2,34.22) ¼ 12.23, p ¼ .000], with regard to digital information processing and communication. The effect of SES on the
three test scores is moderate, with estimated u 2 varying between .06 and .07. In order to identify between which SES-groups these dif-
ferences specifically occur, a post-hoc comparison was conducted using the GameseHowell test (see Table 10). The results show that the
mean test score for the ‘higher education degree’ group is significantly different from the ‘secondary education degree’ group in the three
cases of overall test score, higher-order ICT competence test score and the technical ICT skill test score, and significantly different from the
‘primary education degree group’ in the case of the overall test score and the higher-order ICT competence test score. Furthermore, the
‘primary education degree’ group did not significantly differ from the ‘secondary education degree’ group. These results indicate that
primary school students from families of which the mother has a higher education degree have more ability in searching and processing
digital information and in communicating with a computer.