“…Similarly, better staff-to-child ratios, i.e. less children per adult, have been positively associated with process quality in Ecuador, Netherlands, Norway, China, and Portugal (Bjørnestad and Os, 2018 [13]; Helmerhorst et al, 2015 [142]; Hu et al, 2019 [81]; Lopez Boo, Dormal and Weber, 2019 [144]; Pessanha et al, 2017 [145]). It should be noted, however, that another study involving a nationally representative sample of Dutch child centres, did not find group size or child-to-staff ratio to be related to emotional or educational process quality (assessed by CLASS-toddler).…”