Psychometric Properties of the Chinese Version of the Psy-Flex Among Parents of Children with Autism Spectrum Disorder

This research aimed to translate the original English version of the Psy-Flex, a scale of psychological flexibility, into Chinese and to test its psychometric properties among parents of children with autism spectrum disorder (ASD). Two phases were conducted: (1) translation from English to Chinese (Psy-Flex-C), followed by a semantic equivalence evaluation between two versions, a pre-test, and an evaluation of the Psy-Flex-C in terms of face validity with 20 parents of autistic children, and content validity of the Psy-Flex-C with eight experts. (2) A cross-sectional study with 248 parents of autistic children was conducted for validation, and a subgroup of 50 participants was randomly selected to assess the test-retest reliability at a 2-week interval. The Psy-Flex-C showed satisfactory semantic equivalence with the original version and demonstrated adequate internal consistency (Cronbach's α = 0.84) and test-retest stability (weighted kappa statistic = 0.88). Concurrent validity was supported by a moderate correlation between the Psy-Flex-C and the Comprehensive Assessment of Acceptance and Commitment Therapy Processes (Pearson's r = 0.54, p