AbstractThis methods showcase article provides a detailed overview of a mixed‐effects modeling analysis of corpus data on the use of that in object and subject complementation by native speakers of English compared to its use by German and Spanish learners of English. “We emphasize that we do not claim that our illustrations are the only way to carry out these analyses, but the strategy outlined above has yielded satisfactory results.” (Bates et al., 2018, p. 5)