PHQ-9 vs DSS: A Harmonious Comparison Psychologists and researchers often require robust tools to make cross-comparisons between different mental health diagnostic tests such as PHQ-9 and DSS, a need that has been answered by Harmony. Harmony, innovative software developed for psychologists, employs advanced natural language processing and generative AI models to compare and harmonise questionnaire items that are critical to psychology research. The process of comparing the Patient Health Questionnaire (PHQ-9) and the Depressive Symptoms Scale (DSS) can be both challenging and time-consuming. Harmony makes the process of harmonisation significantly easier, providing an advanced solution to the PHQ-9 vs DSS dilemma. Harmony uses large language models to give a percentage match between each questionnaire item, an invaluable tool in the research process. The recurring debate of PHQ-9 vs DSS is better evaluated with Harmony in the equation. Psychologists can now directly pull instruments from Harmony’s extensive database or even upload their own questionnaires in PDF format, saving considerable time. With its multi-language support, Harmony is an indispensable tool for psychometric analysis. Whether it’s PHQ-9 vs DSS or other comparisons, Harmony offers a solution that is both effective and efficient.