When psychologists or social scientists try to assess patients’ mental health, two of the most commonly used questionnaires are the Center for Epidemiological Studies-Depression (CES-D) and the Hospital Anxiety and Depression Scale (HADS). Comparing these two instruments, CES-D vs HADS, offers valuable insights into the mental health profiles of populations. Often, researchers struggle with harmonisation - a task of comparing similar items across different questionnaires. It is here that Harmony comes into play, a software tool specifically designed to compare and harmonise questionnaire items. Harmony uses advanced natural language processing and generative AI models to match items in questionnaires like CES-D vs HADS. Not only does the tool save time, but it also overcomes the subjectivity in the harmonisation process. Harmony gives researchers the ability to test the consistency of results across diverse studies, thereby contributing to more robust and conclusive findings when comparing CES-D vs HADS. Harmony also comes equipped with a convenient feature of allowing item comparison in multiple languages. So, whether you are working with CES-D, HADS, or any other instrument from Harmony’s extensive database, or even if you have your own instruments, you can easily drag and drop your PDFs into the Harmony web interface. So, when dealing with CES-D vs HADS comparative studies, consider using Harmony to streamline and improve your research process.