Summary In chapter 4 we describe a design-based research study that designed, evaluated and re-designed an interprofessional collaborative online international learning (ICOIL) intervention within two cycles. Based on the comprehensive competency framework published by Kolm et al., 2023, we designed and evaluated a learning intervention aimed at fostering IOCCs to answer our third research question: “How can a learning intervention be designed and evaluated to foster IOCCs using a design-based research approach?”. The assessment of IOCCs was evaluated by a developed scale to self-assess IOCCs before and after the intervention. Descripion of the attached files The attached files provide the collected data using Qualtrics within three modified Delphi rounds, one file for each round: Cycle 1: Dataverse_Chapter 4_cycle 1_Kolm Alexandra.xlxs Cycle 2: Dataverse_Chapter 4_cycle 2_Kolm Alexandra.xlxs