Development and Validation of the Japanese Version of the ADHD Stigma Questionnaire ( ASQ ‐J): Cultural Adaptation and Psychometric Properties in Japan

This study aimed to develop a Japanese version of the ADHD Stigma Questionnaire (ASQ‐J) and examine its reliability and validity. We surveyed 248 individuals aged 18 years and older (117 diagnosed with ADHD and 131 without ADHD). The results of a confirmatory factor analysis supported a three‐factor structure comprising 26 items: “Disclosure Concern,” “Negative Self‐Image,” and “Concern with Public Attitudes,” with acceptable fit indices. The ASQ‐J demonstrated good internal consistency, test–retest reliability, and construct validity. Although partial support for construct validity was observed through associations with self‐esteem, further research is needed to confirm the construct validity more comprehensively. Future studies should increase the sample size and include a broader age range—particularly younger individuals—to reassess the scale's reliability and validity, including its construct validity.