Paweł Kosowski Polish adaptation of measures of attitudes, subjective norms, perceived behavioral control, and intentions based on the Theory of Planned Behavior in the context of blood donation

Abstrakt

Introduction: This study adapted and validated common metrics for assessing donation attitude, subjective norm, perceived behavioral control, and intention within the context of blood donation in Poland, using the Ajzen’s Theory of Planned Behavior (TPB) as a framework. Addressing a gap in psychological research on blood donor motivation in Poland, the study responds to demographic challenges and fluctuating donation rates. 

Material and Methods: A TPB-based tool was translated, adapted, and validated with 422 participants. Confirmatory factor analysis (CFA), second-order CFA, and structural equation modeling (SEM) were employed to assess reliability and predictive validity. External consistency was tested using established psychological measures, including the Light Triad Scale, The Flourishing Scale, NEO-PI-R subscales and Generalized Self-Efficacy Scale. 

Results: The adapted instrument demonstrated strong psychometric properties, with CFA confirming a four-factor structure and good model fit indices (CFI = 0.958; RMSEA = 0.095). The TPB model explained 61.4% of the variance in donation intention. Key predictors included a positive attitude, strong subjective norms, and high perceived behavioral control. External consistency analyses confirmed significant correlations with related psychological constructs, supporting validity. 

Conclusions: The validated Polish TPB-based metrics provide a reliable tool for assessing psychological determinants of blood donor motivation. These findings enhance understanding of donor behavior in Poland and offer insights for developing targeted recruitment and retention strategies to strengthen the national blood donation system.