Development and Validation of the Unified Harmony Measure.

Harmony underpins well-being and sustainability and has been universally recognized across cultures for its profound role in human flourishing. This study developed and validated the Unified Harmony Measure based on the Unified Harmony Framework spanning coexistence, coherence, and continuity across the intrapersonal (Me Harmony), interpersonal (We Harmony), and environmental (Eco Harmony) levels. Scale development involved a multi-phase process, including item generation, expert review, pilot testing, and psychometric analysis. Scale validation was conducted using culturally diverse samples and included classical item analysis, item response theory analysis, correlation and regression analyses, and short form construction. The Unified Harmony Measure demonstrated high internal consistency, theoretically coherent internal structures, and strong associations with conceptually related constructs, supporting its reliability and validity. Its short form also exhibited sound reliability and validity, along with incremental predictive power, enhancing its utility and efficiency for researchers and practitioners. This Unified Harmony Measure offers useful insights and psychometric tools for understanding and enhancing harmony in diverse contexts, with practical implications for interpreting harmony scores and designing targeted interventions.