The Brief Happiness Scale: Assessing Subjective Happiness in Children and Adolescents

Technical Summary: The Brief Happiness Scale (BHS)

Problem Statement
While happiness is a fundamental indicator of mental health and well-being across the lifespan, its assessment during adolescence presents specific challenges. Existing instruments often suffer from three primary limitations: they are frequently too lengthy for school-based screening and large-scale studies, they are culturally narrow or designed primarily for adults, and they often conflate happiness with broader constructs like general psychological well-being or life satisfaction alone. Consequently, there is a need for a brief, developmentally appropriate, and psychometrically robust measure that captures the subjective evaluation of happiness (encompassing general happiness, life satisfaction, and positive emotional orientation) without overburdening adolescent respondents. Furthermore, the mechanisms linking psychological distress to happiness remain under-explored, particularly regarding how multidimensional belonging (friends, school, family, community) mediates this relationship.

Methodology
This cross-sectional study utilized two independent samples of 665 adolescents (aged 10–18) from secondary and high schools in Türkiye.

• Scale Development: An initial pool of 18 items was generated based on theoretical and empirical literature regarding happiness, subjective well-being, and positive youth development. Items were reviewed by experts for clarity and developmental appropriateness.
• Procedures:
  • Sample 1 (n=262): Used for Exploratory Factor Analysis (EFA) to determine the underlying factor structure.
  • Sample 2 (n=405): Used for Confirmatory Factor Analysis (CFA) to validate the structure, assess measurement invariance across gender, school level, and academic achievement, and conduct validity and mediation analyses.
• Measures:
  • Brief Happiness Scale (BHS): A self-report measure using a 5-point Likert scale.
  • Youth Belongingness Questionnaire (YBQ): Assessed belonging across four domains: friends, school, family, and community.
  • Emotional Distress Scale (EDS): Assessed psychosocial distress.
  • Academic Achievement: Measured via self-reported Grade Point Average.
• Analysis: Analyses included EFA (principal component analysis with promax rotation), CFA (assessing fit indices: CFI, TLI, RMSEA, SRMR), measurement invariance testing (configural, metric, scalar), and parallel mediation analysis using PROCESS Macro (Model 4) with 5,000 bootstrap resamples.

Key Results

1. Factor Structure: The initial 18-item pool was refined through EFA and CFA. Cross-loadings and redundancy led to the removal of items, resulting in a final 5-item unidimensional scale. The final model demonstrated excellent fit statistics (CFI = .99, TLI = .98, RMSEA = .069, SRMR = .019) and strong factor loadings (λ range = .60–.88).
2. Reliability and Validity: The scale demonstrated strong internal reliability (Cronbach's α and McDonald's ω ranged from .85 to .89). Criterion validity was supported by significant negative correlations with psychological distress (r = −.39) and significant positive correlations with all dimensions of belongingness (ranging from .58 to .68).
3. Measurement Invariance:
   • Configural and Metric Invariance: Supported across gender, school level, and academic achievement groups, indicating the factor structure and loadings are consistent.
   • Scalar Invariance: Fully supported only across academic achievement groups. Partial support was found for gender, while scalar invariance was not supported across school levels (secondary vs. high school), suggesting mean score comparisons across school levels should be interpreted with caution.
4. Mediation Analysis: Psychological distress significantly predicted lower happiness. However, when belonging dimensions were introduced, the direct effect of distress on happiness became non-significant, indicating full mediation.
   • Significant Mediators: School belonging, family belonging, and community belonging significantly mediated the relationship between distress and happiness.
   • Non-Significant Mediator: Friend belonging did not significantly mediate the relationship, despite being positively correlated with happiness.
   • Variance: The model accounted for 57% of the variance in adolescents' happiness.

Key Contributions

• Instrument Development: The study successfully developed and validated the Brief Happiness Scale (BHS), a concise, 5-item instrument that effectively captures adolescent subjective happiness without the burden of longer scales.
• Psychometric Rigor: The paper provides robust evidence for the unidimensionality, reliability, and validity of the BHS, including a nuanced analysis of measurement invariance that highlights where cross-group comparisons are valid and where they are not.
• Theoretical Insight: By testing a parallel mediation model, the study elucidates the relational mechanisms linking distress and happiness. It identifies that the negative impact of psychological distress on happiness is largely explained by a weakened sense of belonging in family, school, and community contexts, rather than solely by individual emotional strain.

Significance and Claims
The authors claim that the BHS offers a practical, psychometrically sound tool for large-scale school screenings, mental health monitoring, and developmental research, addressing the gap for brief, adolescent-specific happiness measures. The findings suggest that adolescent happiness is not merely an internal affective state but is deeply embedded in relational and social systems.

The study posits that interventions aimed at improving adolescent well-being should extend beyond individual psychological processes to strengthen the sense of belonging within family, school, and community environments. Specifically, the strong mediating role of community and school belonging suggests that fostering social integration and supportive climates in these settings may be critical for mitigating the impact of psychological distress on happiness. The authors conclude that incorporating happiness and belonging into educational and public health policies could provide a more holistic approach to adolescent development, shifting focus from solely reducing risk indicators to promoting positive functioning.

Limitations noted by the authors include the cross-sectional design (precluding causal conclusions), the reliance on self-report data (risk of common-method bias), and the single cultural context (Türkiye), necessitating future longitudinal and cross-cultural validation.