*Review* **Children's and Adolescents' Happiness and Family Functioning: A Systematic Literature Review**

**Flavia Izzo, Roberto Baiocco \* and Jessica Pistella**

> Department of Developmental and Social Psychology, Faculty of Medicine and Psychology, Sapienza University of Rome, 00185 Rome, Italy

**\*** Correspondence: roberto.baiocco@uniroma1.it

**Abstract:** Background: the present research represents the first systematic review of the literature on the relation between happiness (i.e., subjective well-being, life satisfaction, positive affect) and family functioning in families with children aged 6–18 years. Method: relevant articles were systematically searched in three scientific databases (i.e., PsycInfo, Pubmed, and Web of Science) in June 2022. The databases were searched for original articles published after 1968 with the keywords "happiness" and "family functioning." Results: of the 2683 records recovered, 124 original articles met the eligibility criteria and were included in the review. The articles were divided according to four emergen<sup>t</sup> themes: (1) family dimensions and happiness; (2) global family functioning (i.e., family functioning, and family relationships), environmental variables, and happiness; (3) parental differences; (4) longitudinal studies. Conclusions: the results of the review provide evidence for a positive relation between happiness and family functioning, across different cultures and age groups: Family dimensions (e.g., cohesion, communication) were found to strongly predict children's and adolescents' happiness. Future studies should investigate the differences between fathers and mothers using multi-informant and mixed methods procedures and a longitudinal research approach. The implications of the findings for children's positive development are discussed.

**Keywords:** happiness; subjective well-being; life satisfaction; positive affect; family functioning; developmental age; systematic review
