There are many concepts in the social sciences that are measured using multiple indicators. Such concepts have been called by Blalock (1968) concepts-by-postulation because one needs a theoretical argument to define them. Within the set of concepts-by-postulation. a distinction has been made between concepts with reflective indicators and concepts with formative indicators. https://www.jmannino.com/mega-pick-NFL-San-Francisco-49ers-Zone-Block-iPhone-14-Pro-MagSafe-Case-p80213-quick-pick/