“…Indeed, empirical evidence suggests that individual differences in WM capacity predict grammar development (Lado, 2017;Serafini & Sanz, 2016; for a comprehensive review, see McCormick & Sanz, 2022), and comprehension (Sagarra, 2017), for example. The contribution that WM capacity makes to production, including writing, has received less attention, but recent studies (see Table 1) show that individual differences in WM influence second language written texts (but see Manchón et al, 2023, in this issue) and writing processes (especially regarding pausing behavior; see Révész et al, 2023 andTorres, 2023 in this issue); that task demands and different modes of production -oral or written-differentially tax second language processes that involve WM; and that, regardless of individual WM skills, writing tasks afford better opportunities for effective grammar learning compared with oral tasks, as evidenced in Zalbidea (2017) and Zalbidea and Sanz (2020).…”