The Strengths and Difficulties Questionnaire (SDQ) and the Inventory of Callous Unemotional Traits (ICU) are two widely used psychological evaluation tools used for studying behaviour in 2-17 year olds. As these two questionnaires cater to examining different behavioural facets, comparisons or correlations between SDQ and ICU often prove invaluable for researchers and clinicians. Harmony, designed with advanced natural language processing and generative AI models, offers an efficient way to harmonise and compare items from both SDQ and ICU, enhancing the value of study outcomes. Harmony simplifies the process of comparing SDQ and ICU by giving a percentage match between each item in both the questionnaires. This alleviates the tedious process of manually comparing and harmonising questionnaire items in different languages. Linguistic differences cease to be an obstacle as Harmony’s capability extends to multiple languages. With Harmony, researchers across the globe can compare SDQ and ICU, conduct longitudinal analysis, and test consistency across various studies. For those working in psychology research, comparing questionnaires like SDQ and ICU has never been easier with Harmony. You can drag and drop your own instruments in PDF format or select from Harmony’s comprehensive database to begin analyzing. Access Harmony’s web interface at https://harmonydata.ac.uk/app to explore more. The showdown between SDQ vs ICU doesn’t have to be a long, drawn-out process – let Harmony harmonise for you.