“…Early studies on PM development have indicated age-related increases in PM performance across childhood and adolescence, yet they have been predominantly descriptive in nature (for a review on childhood, see Mahy, Moses, & Kliegel, 2014; for studies comprising adolescents, see Wang et al, 2011;Wang, Kliegel, Yang, & Liu, 2006;Zimmermann & Meier, 2006) and it is only now that research is beginning to explore the underlying mechanisms of such age-related effects. Developmental improvements in PM performance have mainly been attributed to the parallel development of executive functions (e.g., Altgassen, Vetter, Phillips, Akgün, & Kliegel, 2014;Wang et al, 2011), and thus the ongoing development of the prefrontal cortex into young adulthood (Casey, Tottenham, Liston, & Durston, 2005;Luciana, Conklin, Hooper, & Yarger, 2005).…”