Cognitive Development and ECEC Quality 1 Running head: Cognitive Development and ECEC Quality Is Cognitive Development at 3 Years of Age Associated with ECEC Quality in Norway? Erik Eliassen Oslo and Akershus University College of Applied Sciences Email: erik.eliassen@hioa.no Phone: +47 92806172 ORCID: orcid.org/0000-0002-0290-9010 Henrik Daae Zachrisson The Norwegian Center for Child Behavioral Development & Center for Educational Measurement, University of Oslo Email: h.d.zachrisson@atferdssenteret.no Phone: +47 40048017 Edward Melhuish University of Oxford, & Birkbeck, University of London Email: e.melhuish@bbk.ac.uk