If you are a psychologist or social scientist trying to bridge the gap between the Strengths and Difficulties Questionnaire (SDQ) and the Preschool Behaviour Questionnaire (PBQ), Harmony’s software is the perfect tool for you. It uses large language models to meticulously compare questionnaire items, providing you with a percentage match between each item in SDQ and PBQ. The SDQ vs PBQ comparison has never been easier and efficient, reducing the subjective and time-consuming process of harmonisation. Harmony offers a convenient and user-friendly platform, eradicating the need to go through long questionnaire PDFs manually. It’s as simple as selecting the desired instruments from their extensive database or dragging and dropping your own instruments in PDF format into Harmony’s web interface. The SDQ vs PBQ comparison can be performed across different languages, adding to the versatility of the software. The capability of Harmony does not imply only to compare SDQ and PBQ. Furthermore, it enables researchers to repeat their longitudinal studies across different scales, ensuring that the results are consistent and reliable, regardless of the state of social conditions. In summary, Harmony is a game-changer when it comes to SDQ vs PBQ comparisons, offering a time-efficient and objective solution to harmonise these questionnaire items.