So sánh phương pháp

	Độ tin cậy kiểm tra lại đa nhóm	Alpha Cronbach đa nhóm
Lĩnh vực	Trắc lượng tâm lý	Trắc lượng tâm lý
Họ	Latent structure	Latent structure
Năm ra đời	1979–2000	1951 (alpha); multi-group application from 1980s onward
Người khởi xướng	Systematic multi-group extensions developed alongside measurement invariance frameworks (Vandenberg & Lance, 2000); intraclass correlation foundation in Shrout & Fleiss (1979)	Lee J. Cronbach (alpha); multi-group extension in cross-cultural and measurement invariance research
Loại	Reliability estimation across groups	Reliability / internal consistency comparison
Công trình gốc	Shrout, P. E. & Fleiss, J. L. (1979). Intraclass correlations: Uses in assessing rater reliability. Psychological Bulletin, 86(2), 420–428.	Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334.
Tên gọi khác	multi-group temporal stability, cross-group test-retest reliability, group-comparative retest reliability, multi-sample temporal consistency	group-stratified alpha, cross-group alpha comparison, subgroup internal consistency, MG-alpha
Liên quan	5	4
Tóm tắt	Multi-group test-retest reliability evaluates whether a measure produces stable scores across time separately for two or more defined groups — such as different genders, age cohorts, or clinical populations — and determines whether the degree of that temporal stability is equivalent across those groups.	Multi-group Cronbach's alpha estimates and compares the internal consistency reliability of a scale separately within each of two or more defined subgroups. It is used in cross-cultural, demographic, and comparative psychometric research to establish that a scale measures its construct with equivalent precision across groups before making cross-group comparisons.