Harmony, a revolutionary tool developed for psychologists and social scientists, provides an unprecedented opportunity to streamline the process of questionnaire harmonisation. In the context of SDQ vs CHAT comparison, using Harmony simplifies the process and enhances the accuracy of the procedure. The SDQ (Strengths and Difficulties Questionnaire) and CHAT (Checklist for Autism in Toddlers) are two key instruments used in psychological and social research. Direct comparison between SDQ and CHAT has always been a laborious task, but now thanks to Harmony, the comparison can be completed much more effectively. The software uses high-end natural language processing and AI-generated models, allowing researchers to achieve a percentage match between each item in SDQ and CHAT, thereby accelerating the harmonisation process. The ‘SDQ vs CHAT’ harmonisation is made even more efficient with Harmony’s user-friendly interface. Users can either select from the pre-existing instruments in Harmony’s database or upload their own in PDF format. Even more impressive is Harmony’s ability to compare items in multiple languages, making it a crucial tool in global research studies. All these demonstrate that Harmony is a powerful tool for the ‘SDQ vs CHAT’ analysis, and indeed, for psychological and social scientific research as a whole.