Validation of an Affective Domain Instrument for Pre-Service Non-Technical Teachers: Assessing Opinions, Beliefs, and Assessments of Worth at UNIMED^s Faculty of Engineering Sumarno, Selamat Riadi, Nur Basuki, Zulkifli Matondang
Universitas Negeri Medan
Abstract
Affective domains are essential components of professional identity for pre-service teachers. This study aimed to validate an affective domain instrument covering opinions, beliefs, and assessments of worth designed to measure these constructs among pre-service non-technical teachers. A cross-sectional study was conducted with 247 students from semesters II through XII enrolled in three non-technical study programs (cosmetology, fashion design, and culinary arts) at the Faculty of Engineering, Universitas Negeri Medan. Instrument validity was initially assessed using Pearson^s product-moment correlation, with all items across the three aspects exceeding the critical r-value (p < .05), indicating initial validity. Reliability analysis demonstrated strong internal consistency for each aspect, with Cronbach^s alpha values above 0.80. Confirmatory Factor Analysis (CFA) using LISREL was then performed to confirm the factor structure- CFA revealed several items with factor loadings below recommended thresholds (0.35): six in opinions, four in beliefs, and five in assessments of worth. These items require revision or removal to enhance construct validity. Overall, the affective domain instrument demonstrated acceptable validity and strong reliability, offering a valuable tool for assessing affective dispositions essential to preparing effective future educators in vocational education contexts.
