“…ECEC quality is a multidimensional concept and broadly defined aims at promoting children's well-being and positive developmental outcomes (Layzer and Goodson, 2006 [1] ). A common distinction is made between structural characteristics, process quality and staff's beliefs (Howes et al, 2008 [2] ; NICHD Early Child Care Research Network, 2002 [3] ; Pianta et al, 2005 [4] ; Sylva et al, 2006 [5] ; Thomason and La Paro, 2009 [6] ). Structural quality entails the distal and regulable factors, such as child-staff ratios, group size and staff training/education (Abbott-Shim, Lambert and McCarty, 2000 [7] ; Burchinal et al, 2010 [8] ; Barros et al, 2016 [9] ; Howes et al, 2008 [2] ; NICHD Early Child Care Research Network, 2000 [10] ; Thomason and La Paro, 2009 [6] ).…”