Comparar métodos

	Funcionamento Diferencial do Item Longitudinal (DIF Longitudinal)	Teste de Invariância de Medida
Área	Psicometria	Psicometria
Família	Latent structure	Latent structure
Ano de origem	1980s–2000s	2000
Autor original	Multiple contributors; foundational DIF methods by Lord (1980) extended to longitudinal designs	Vandenberg & Lance
Tipo	Item-level bias detection across time	Multi-group confirmatory factor analysis procedure
Fonte seminal	Millsap, R. E., & Kwok, O. M. (2004). Evaluating the impact of partial factorial measurement invariance on selection in two groups. Psychological Methods, 9(1), 93–115.	Vandenberg, R. J., & Lance, C. E. (2000). A review and synthesis of the measurement invariance literature. Organizational Research Methods, 3(1), 4–70.
Outros nomes	longitudinal DIF, DIF across time, temporal DIF, longitudinal item bias	Factorial Invariance, Measurement Equivalence, Configural-Metric-Scalar Testing, Ölçüm Değişmezliği
Relacionados	6	3
Resumo	Longitudinal differential item functioning detects whether individual test or scale items behave differently across measurement occasions for the same respondents. It extends standard DIF methodology to repeated-measures designs, ensuring that observed change scores genuinely reflect construct change rather than shifts in item characteristics over time.	Measurement invariance testing is a sequence of nested confirmatory factor analysis (CFA) models that examines whether a psychological scale measures the same latent construct in the same way across distinct groups or time points. Systematized and popularized by Vandenberg and Lance (2000), the procedure tests a hierarchy of constraints — from identical factor patterns to identical item intercepts — so that researchers can justify meaningful group comparisons on latent means.