Czy wielodzietność obniża osiągnięcia szkolne?
Is a large family detrimental to academic performance?

Summary/Abstract: Data gathered in the country companion to PISA 2006 was analyzed to determine the influence of family size on educational performance. The representative sample consisted of 4451 pupils aged 17–18 from all types of secondary school in Poland. Two variables described a pupil’s position in the family: birth order and number of younger siblings. Four hypotheses were tested: (1) academic performance is more strongly determined by birth order than number of younger siblings and with increasing birth order there is a decrease in (2) performance, (3) the likelihood of choice of school which prepares for further education, and (4) orientation towards adult values. Hierarchical linear models confirmed the hypotheses.

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