“…Across the preschool and elementary years, children become more adept at categorizing facial expressions (e.g., Plate et al, 2019 ; Woodard et al, 2022 ). For example, between the ages of 6 and 12, children become more flexible when updating their category boundaries of faces that were morphed from calm expressions to upset expressions (Plate et al, 2023 ). They also come to use people’s facial expressions to guide their own behaviors and to infer people’s mental states (e.g., Wu & Gweon, 2021 ; Wu & Schulz, 2018 , 2020 ; Wu et al, 2021 ; also see Nook & Somerville, 2019 and Ruba & Pollak, 2020 for broader reviews of children’s emotional development).…”