The LERI Laboratory is a research space created to better understand interpersonal relationships based on Evolutionary Psychology, particularly in youth and adults, incentivizing interdisciplinary debate and contributing to the specialization in Experimental Psychology through the study of psychological adaptations that facilitate social exchanges. Our theoretical basis aims to understand interpersonal emotions in relationships in general, as well as jealousy and love in attachment, friendship and couple relationships, incorporating elements of Ethology, Biology, Anthropology and Economics, together with the disciplinary base of Personality Psychology and Social Psychology.