Design, methodological supervision, for Italian Sign Language assessment and certification.

The research concerns the design, methodological coordination, and psychometric and statistical validation of tools for the assessment and certification of proficiency in Italian Sign Language (LIS).The activities will include defining the validation design, overseeing data collection and quality-control procedures, and applying psychometric methods and advanced statistical models to analyse reliability, validity, internal consistency, and item quality.They will also include the development of standardised protocols, technical and scientific reports, and operational recommendations to ensure fairness, accuracy, and comparability in the measurement of language proficiency.