“…Compared to aspects of self-regulation such as reactivity, persistence and effortful control develop later, become more voluntary, and are shaped by caregivers throughout early childhood (Kochanska, Murray, & Harlan, 2000; Rothbart & Bates, 2006). Children at greater risk (e.g., from low-income families) show declines in persistence from preschool to first grade (McDermott, Rikoon, & Fantuzzo, 2014) and low levels of persistence from age 5 to 10 years (Zhou et al, 2007). Thus, a better understanding of what shapes the development of mastery motivation in early childhood could inform how parents and teachers optimally support the regulatory behaviors that underlie mastery motivation, particularly for children at greater risk.…”