Background: Stigma can not only threaten the self-identity of secondary vocational students, but also have negative effects on their mental health and behavior. Objective: This study aimed to develop the Self-Stigma Scale for Secondary Vocational Students (SSS-SVS) and test its reliability and validity. Patients and Methods: This study formed a scale based on the stigma conceptualization model and open questionnaire. The formal survey was divided into two stages. In the first stage, a preliminary questionnaire was administered to 328 secondary vocational students to develop a formal SSS-SVS according to the results of the data check. In the second stage, the SSS-SVS, Social Recognition of Secondary Vocational Students (SR-SVS), Intensity of Willingness to Become a Secondary Vocational Student (IWB-SVS), Stigma-Consciousness Scale (SCS), Learning Adjustment Scale (LAS), Professional Identity Scale for Secondary Vocational Students (PIS-SVS), and the Self-Compassion Scale (SCoS) were administered to 1079 vocational secondary school students. Results: The SSS-SVS consisted of 21 items which were divided into three dimensions of negative characteristics, self-deprecation, and opportunity loss, reflecting secondary vocational students’ perception of negative public evaluation, self-feeling under the influence of stigma, and cognition of negative impact on their identity. The confirmatory factor analysis (CFA) shows that the three-factor model has good fit indices. The total score and the scores of each dimension of the SSS-SVS were significantly and positively correlated with Stigma Consciousness; they were significantly and negatively correlated with SA-SVS, IDB-SVS, SVS-PIS, Learning Adjustment, and Self-Compassion. Both the Cronbach’s α coefficients of the total scale and each dimension and the McDonald’s ω coefficients were satisfactory. Additionally, the scale had measurement equivalence across gender and grade levels. The SSS-SVS has limitations and may be affected by cultural background. Future studies should expand the sample and conduct cross-cultural verification. Conclusion: The SSS-SVS is a reliable and valid instrument for assessing secondary vocational students’ self-stigma, providing support for developing relevant programs and policies. It also advances secondary vocational education and enhances students’ mental health. © 2025 Leng et al.
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