“…This vague definition requires further explication. In current research, there is a broad discussion on the classification of adulthood (e.g., adolescence, early, middle, and late adulthood), as well as on changes during adulthood (e.g., concerning personality, see Srivastava et al, 2003, or language across the lifespan, see Beaman & Buchstaller, 2021;de Bot & Schrauf, 2009;Gerstenberg & Voeste, 2015). The changes people undergo are not precisely predictable; they depend on individual factors, such as lifestyle, socioeconomic status, and biological components (e.g., cognitive or general health peculiarities), which we must consider.…”