“…Of the 24 facial emotion recognition studies that referenced intensity levels of their stimuli, only eight (33.3%) reported results for different intensity levels (Auerbach et al, 2015;Bowen et al, 2014;Hauschild et al, 2020;Lee et al, 2013;Martin-Key et al, 2018;Pozzoli et al, 2017;Smith et al, 2010;Zupan, 2015); five (20.8%) additional studies reported accuracy for high intensity expressions only (Fairchild et al, 2009;Legenbauer et al, 2018;Lydon & Nixon, 2014;Sully et al, 2015;Whitaker & Widen, 2018). Of the remaining studies, eight (33.3%) reported results based on an overall intensity only (Airdrie et al, 2018;Fairchild et al, 2010;Hauschild et al, 2020;Kessels et al, 2014;McClure et al, 2005;Novello et al, 2018;Shenk et al, 2013;Thomas et al, 2007;van Rijn et al, 2011), and four (16.7%) reported results based on the minimum intensity threshold for recognition (Leganes-Fonteneau et al, 2020;Porter-Vignola et al, 2021;Short et al, 2016;Vanhalst et al, 2017). Only one of the seven studies investigating vocal emotion recognition examined intensity (Zupan, 2015); this study reported overall recognition of vocal emotion expressions, but also recognition of high and low intensity expressions.…”