Social cognition research encompasses any type of assessment that informs us on how people process social and/or emotional information, including emotion perception, empathy and mentalizing measures. To address measurement limitations and challenges within social cognitive research, a group of experts co-led by AICE mamber Tim Ziermans convened to form a social cognition Research Harmonization Group (RHG). For the first aim of this study, the RHG surveyed a global group of experts in social cognition, from various clinical and non-clinical backgrounds, including AICE members, to gather nominations for cross-culturally and transdiagnostically appropriate measures. Ninety-eight experts residing in 25 countries across five continents responded to the invitation and nominated a total of 81 tasks for further qualitative evaluation in a Delphi study to reach consensus.