is a theory which implies all variables (not only certain variables in a select group) remain identical during the processes of factor analysis irrespective of the sample they are taken from.

FACTORIAL INVARIANCE: "Factorial invariance is one theory which suggests that all variables remain constant during factor analysis despite the experiment they're taken from."
Cite this page: N., Pam M.S., "FACTORIAL INVARIANCE," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/factorial-invariance/ (accessed April 23, 2021).