<![CDATA[This study develops and evaluates a digital self-assessment tool to measure students' affective domain in Civics Education at the senior high school level. The research addresses the lack of measurement of affective outcomes in civic and character education. Although the affective dimension is an important part of the curriculum, most teachers lack reliable tools to document students' value internalisation. Using a Research and Development design with the ADDIE framework, the tool was built on Krathwohl's taxonomy of the affective domain and supported by attitude theory, social cognitive theory, and the concepts of global citizenship and character education. Content validity was assessed using Aiken's V with five experts, followed by empirical testing with 182 participants in the pilot test and 498 participants in the field test. Item-total correlation and Cronbach's alpha were used to assess item performance and internal consistency, with reliability coefficients between 0.706 and 0.804. EFA revealed a general affective factor while retaining five theoretically relevant factors: receiving, responding, valuing, organisation, and characterisation. CFA proved that the measurement model is acceptable (CMIN/df = 2.545; CFI = 0.927; TLI = 0.916; RMSEA = 0.056); however, AGFI slightly failed the strict 0.90 criterion. This research contributes both a context-relevant yet globally applicable civic affective scale and an illustration of digital self-assessment for evidence-based affective assessment, while addressing issues such as social desirability and cross-cultural validity.]]>
