@misc{Grygiel_Paweł_Determinants,
 author={Grygiel, Paweł},
 howpublished={online},
 publisher={Educational Research Institute},
 language={pol},
 type={article},
 title={Determinants of changes in perceptions of social integration in the classroom between third and sixth graders in primary school. The latent growth curve model},
 keywords={sociology of education, latent growth curve, longitudinal bifactor model, relationships with classroom peers, feeling of social integration, sociometric network, developmental changes},
}