[Association of the meaning of life with satisfaction, the occurrence of subjective complaints and the family's economic status in the population of lower secondary school students].

Introduction: Feeling of meaning in life is extremely crucial factor of mental health. The lack of it can result in various disorders. Many authors, especially those connected with current of humanistic psychology underline the teenagers’ life sense.

[Selected family socio-economic factors as predictors of peer violence among school children in Poland].

Aim: Analyses concerning peer violence among girls and boys aged 13-17 years, in the context of socio- -economic characteristics of the family: family structure, parental employment status and perceived family wealth.

Material And Methods: Preliminary data from the recent HBSC studies conducted in 12 voivodeships in Poland in 2013 was used. The analyzes concerned 2300 students aged 13-17 years (45% boys) and focused on the following types of violence: being a perpetrator and a victim of bullying, participation in fights and cyberbullying.

[Sedentary behaviour 13-years-olds and its association with selected health behaviours, parenting practices and body mass].

Objective: 1. To estimate the time spent in sedentary behaviour (watching TV, using the computer, doing homework). 2.