International Social Science Program. (2000). Work orientations [Computer file]. Ann Arbor, MI: Interuniversity Consortium for Political and Social Research.
2.
Reise, S. P., Widaman, K. F., & Pugh, R. H. (1993). Confirmatory factor analysis and item response theory: Two approaches for exploring measurement invariance. Psychological Bulletin, 114, 552-566.
3.
Samejima, F. (1969). Estimation of latent ability using a response pattern of graded scores. Psychometrika Monographs, 34(4), 100-114.