Study 1 = unpublished study with four mask types (none, community, surgical, KN95/valve) and social perception ratings, emotion perception in the neutral face
Study 2 = published study with surgical masks and social and emotion perception. (Un)mask yourself! Effects of face masks on facial mimicry and emotion perception during the COVID-19 pandemic https://www.tandfonline.com/doi/full/10.1080/02699931.2021.1950639
Codebook: https://box.hu-berlin.de/d/7fe66dd41c70421cbf19/