“…The Head-Toes-Kneed-Shoulders task (HTKS; Ponitz et al, 2008;Ponitz, McClelland, Matthews, & Morrison, 2009; see detailed description in the instruments section) has been widely used to assess selfregulation in preschool (e.g., Hee, Xu, & Krieg, 2018;Montroy, Bowles, Skibbe, McClelland, & Morrison, 2016;Puranik, Boss, & Wanless, 2019;Solé-Ferrer, Mumbardó-Adam, Company-Romero, Balmaña, & Corbella-Santom, 2019). However, the development of other sensitive and ecologically valid measures to assess young children's self-regulation still constitutes a gap in research (McClelland & Cameron, 2012;Perry, 2019).…”