Background: The social-ecological environment of undocumented children of migrant workers includes varying levels of risk factors. Growing up in these conditions compromises children's development on all levels. Many of these children are in need of psychotherapy, however, due to limited resources, only a few of them receive mental health aid.…

The present research was designed to contribute to a better understanding of the social forces activated in a heterogeneous preschool setting by studying the way in which heterogeneous and homogeneous groupings influence the social interactions of disadvantaged children with peers and adults. (Authors)