The aim of the current study is to examine the quality of sibling relationships in relation to family functioning in Greek families with typically developing school-age children. The sample: 251 intact Greek families with two children (251 parents — 1 parent participated from each family — and 251 children). Research instruments: (a) the Family Adaptability and Cohesion Evaluation Scales III (FACES III; Olson, 1986), administered to both parents and children), (b) the Sibling Relationship Questionnaire (SRQ; Furman& Buhrmester, 1985); and (c) the family constellation: number of children, birth order, gender and socioeconomic level. According to the findings, the quality of a sibling relationship is associated with family cohesion and adaptability. Regarding children’s gender, the Warmth/Closeness scale is lower in families with children of different gender compared to families with children of the same gender. Regarding birth order, first-born children report higher levels of cohesion (ideal and actual), as well as higher Warmth/Closeness (children and parents), in comparison to the second-born children. Regarding parental educational level, parents and children report a higher level when it comes to ideal family and cohesion type (ideal level), as well as higher Warmth/Closeness (parents) when at least one of the parents has a university education background.

Bullying continuously attracts the interest of school communities, government policy makers and researchers. The present study enquires into the role of basic psychological needs in perpetrating and victimisation behaviour of children and youth in the social contexts of school and family in a cross-sectional research design. Specifically, this study focuses on the direct effects that basic psychological needs might have on bullying behaviour and bullying victimisation. It was found that basic psychological needs, forged in the relationships with family and school members, could predict bullying victimisation in each social context. Bullying perpetrations could be predicted only by bullying victimisation stemming from each social context, whereas bullying behaviours in school could also be directly predicted by the basic psychological needs developed in the family. Furthermore, path models verified the multiple influences of family functioning on school relationships. Findings of the present study may contribute to designing effective school interventions and to reforming antibullying guidelines for teachers and parents with respect to the basic psychological needs of the children or adolescents who have been victimised.