When it comes to psychological and social research, comparing various instruments like questionnaires can be a grueling task, especially with different languages involved. Take for instance comparing the General Health Questionnaire (GHQ-12) and the Barratt Impulsiveness Scale 15 (BIS-15). Each has a different purpose and expressions, yet finding similarities for cross-study analysis is key. The task becomes significantly easier when leveraging software like Harmony to handle the GHQ 12 vs BIS-15 comparison. Harmony is a next-generation tool armed with natural language processing and generative AI models, aimed at harmonising questionnaire items, a process that can be otherwise very time-consuming and subjective. In our GHQ 12 vs BIS-15 comparison scenario, Harmony can be used to compare each item, and provide a percentage match, thereby making the comparison objective and efficient. Besides, this amazing tool can handle many languages, making cross-lingual study seamlessly possible. In conclusion, when carrying out such comprehensive analyses involving GHQ 12 vs BIS-15, Harmony offers a remarkable support in laying out the productive path ahead. By allowing seamless comparison and mapping across various psychological instruments, Harmony ensures that researchers and psychologists can make the most out of cohort and longitudinal studies. The powerful AI enabled software certainly shows great promise in breaking down inter-study barriers, and in fostering advanced psychology research.