“…In the literature on these individuals, 'children' can refer to one of the following categories: first, the progeny of mixed couples encompassing all age groups: minors, young adults, and adults (e.g., Unterreiner, 2015); second, the minor and young adult children of these couples (e.g., Celero, 2022;Fresnoza-Flot, 2019;Rodríguez-García et al, 2018;Seiger, 2019); third, the couples' children aged below 18 (e.g., Kalmijn, 2015;Kamada, 2010;Slany & Strzemecka, 2017), and fourth, the couples' adult children (e.g., Zulueta, 2012). In most cases, scholars combine two or all age groups in their studies, allowing them to present heterogenous accounts of mixedness.…”