LAUSR

This study investigated the factor structure and determined the reliability and validity of the Camouflaging Autistic Traits Questionnaire–Japanese version (CAT‐Q‐J) among 204 autistic and 410 non‐autistic people. Since a confirmatory factor analysis revealed no factor validity of the CAT‐Q‐J for both autistic and non‐autistic adults, an exploratory factor analysis was conducted to ensure the psychometric properties matched those of the original scale as much as possible. The results showed the CAT‐Q‐J comprised three subscales, a four‐item compensation subscale, a five‐item masking scale, and a five‐item assimilation subscale. The overall CAT‐Q‐J and all three subscales showed sufficient internal consistency and moderate‐to‐good and stable test–retest reliability in both the autistic and non‐autistic samples. Convergent validity was also supported by the correlations found with measures of autistic traits, well‐being, anxiety, and depression. Different from the original CAT‐Q, compensation/masking for the autistic sample was not correlated with mental health or autistic traits. The reliability and the validity of the overall CAT‐Q‐J were confirmed; however, caution should be exercised when interpreting its subscales.