“…Blau (2000) cautions that projected associations between process and structural quality may be caused by factors that are confounded with the structural and caregiver characteristics. Indeed, researchers have called for inclusion of additional variables to explain the complete picture of quality (Blau, 2000;Buell & Cassidy, 2001;Cassidy, Buell, Pugh-Hoese, & Russell, 1995;Phillips et al, 2001;Whitebook, Sakai, Gerber, & Howes, C. (2001)). They argue that these confounding factors might include center policies, curriculum, directors' leadership skills, staff morale and stability, characteristics of children in the centers, regulatory and financial aspects of care, staff cohesiveness, and overall teacher education.…”