BackgroundHappiness is becoming increasingly relevant in recent research, including adolescents. Many studies are using the single-item measure for adolescent happiness, however, its validity is not well known. We aimed to examine the validity of this measure among adolescents in three countries from distinct European regions – Eastern (Lithuania), Southern (Portugal), and Western (Scotland).Materials and MethodsThe analysis included data from Health Behaviour in School-aged Children (HBSC) study from three countries and three last surveys (2009/10, 2013/14, and 2017/18). The total sample comprised 47,439 schoolchildren. For validity, the indicators reflecting subjective health, life satisfaction, quality of life, well-being, social support, health complaints, bullying, and self-directed violence were assessed. The calculations were conducted in the total sample and by gender, age, survey year, and country.ResultsThe different indicators of concurrent and convergent validity revealed consistent correlations with happiness, with better well-being, health, and subjective perceptions being related to higher happiness. Meanwhile, health complaints, bullying behaviors, and self-directed violence were related to lower happiness. The subgroup differences were consistent across gender, age groups, countries, and survey rounds. The extent of differences was more expressed among girls.ConclusionThe single item for adolescent happiness measurement features a consistent pattern of validity concerning indicators of concurrent and convergent validity. Higher self-reported happiness is associated with better mental and physical health and well-being, and less expressed negative factors (complaints, bullying, and self-directed violence). In addition, among girls the correlations tend to be stronger than boys.

The study examined the relationship between local geomagnetic field fluctuations and physical and mental health among young adults in Lithuania. 264 participants were recruited for a two-week period study, during which they had to fill-in paper questionnaires, consisting of a 12-Item Short Form Survey (SF-12), assessing physical and mental health, 4 questions about physical vitality, emotional vitality, social wellbeing and overall wellbeing, and questions regarding sociodemographic data. The results of the study revealed that possible influence of geomagnetic field fluctuations appear not simultaneously with the changes in human health status, but with a 12-hour lag. This relationship was found to be weak but significant, however, only with mental health.

Teachers' profession is widely described as a mentally challenging one, often leading to burnout. As emotional exhaustion is higher among representatives of this occupation in comparison to other highly emotionally challenging professions, it is important to help teachers gain necessary skills and tools in order to maintain good emotional and overall wellbeing, and effectively cope with daily stressors. The aim of the study described in this paper was to assess the impact of a 5-module emotional intelligence developing training program on teachers' psycho-emotional health. Study sample consisted of 45 teachers, who took part in the study, filling in the research questionnaires before and after the completion of the designed training program.Participants were asked to subjectively rate their level of stress and other parameters, defining their subjective wellbeing. Results of the study revealed that after completing the training program, participants indicated a statistically significantly lower level of stress (𝑝 0.01). Also, participants' subjective evaluation of the quality of their social relationships and their overall wellbeing was significantly higher (𝑝 0.01) after the training program completion.