TY - JOUR AU1 - Labouvie, Erich W. AB - Studies of human development and aging need to consider the possibility that a given measure may apply to different concepts in different age/cohort populations and/or that formally different measures may be required to tap the same concept across various groups. The question of functional equivalence can be raised for both independent and dependent variables, antecedents, and consequents. Equivalence of measures for underlying concepts involves several components: (a) conceptual equivalence, (b) metric equivalence, (c) equality of error variances, and (d) equality of systematic errors, or consistency between true and observed group means. Since empirical information can only take the form of sets of observed relations among measures, investigations of measurement equivalence require that the notions of convergent and discriminant validity be systematically made operational. (PsycInfo Database Record (c) 2024 APA, all rights reserved) TI - Aging in the 1980s: Psychological issues.: Identity versus equivalence of psychological measures and constructs. DA - 2004-08-31 UR - https://www.deepdyve.com/lp/american-psychological-association/aging-in-the-1980s-psychological-issues-identity-versus-equivalence-of-LDTB6WUDxy DP - DeepDyve ER -