“…Further, factor structures and measurement invariance are less meaningful for formative models so switching to a formative model would fundamentally undermine the conceptual basis for the large body of work that examines the factor structure of CLASS observation scores (e.g. Allen et al, 2013;Blazar et al, 2017;Buyse et al, 2008;Downer et al, 2012;Hafen et al, 2014;Hamre et al, 2007Hamre et al, , 2013Hamre et al, , 2014Jensen et al, 2020;Nguyen et al, 2015;Pakarinen et al, 2010;Virtanen et al, 2018).…”