I am interested in examining the latent structure of complex abilities across the lifespan; I am also interested in understanding cognitive processes underlying test performance in younger and older adults; Methodological investigations center around item response theory models for understanding change and processing components in abilities. Longitudinal analyses of item level variables are critical and important issues in investigating developmental and psychometric properties of psychological batteries, survey questionnaires, and inventories.
Selected Publications
Schmidt, K. M., Bowles, R. P., & Giras, T. C. (2004). Human factors questionnaire measurement of engineer decision frequency (Pp. 124-128). COMPRAIL Conference on Rail Safety, Dresden, Germany: WIT Press.
Schmidt, K. M., & Embretson, S. E. (2003). Measuring abilities and item response theory. In J. A. Schinka and W. F. Velicer (Eds.), Comprehensive handbook of psychology, Vol 2: Research methods in psychology (Pp.429-445). NY: Wiley & Sons, Inc.
Schmidt, K.M., Llewellyn, P. L., Taylor, G. J., Weber, P.G., Hong, B., Sellers, R., Wise, C., Wolak, C., McGaw, L, & Nielson, S. (2003). Cloninger’s Temperament and Character Inventory correlates with personality characteristics of organ donation advocates. Journal of Clinical Psychology in Medical Settings, 10, 173-185.
Schmidt, K. M. (2003). How should we score our tests? [Review of the book: Test scoring (Thissen, D, and Wainer, H., (Eds.). Mahwah, NJ: Erlbaum. Contemporary Psychology, 48, 374-377].
Nesselroade, J.R., & Schmidt McCollam, K.M. (2000). Putting the process in developmental processes. International Journal of Behavioral Development, 24, 295-300.
Embretson, S. E., & McCollam, K. M. Schmidt (2000) Applications of a Multicomponent Rasch Model to understanding lifespan differences in processing. In M. Wilson (Ed.), Objective measurement: Theory into practice. (Vol. 5) (pp. 203-218). NJ: Ablex.
Embretson, S. E., & McCollam, K. M. Schmidt (2000). Psychometric approaches to understanding and measuring intelligence. In R. J. Sternberg (Ed.), Handbook of human intelligence. (pp. 423-444) NY: Cambridge University Press.
Green, S. B., Marquis, J. G., Hershberger, S. L., Thompson, M. S., & McCollam, K. M. Schmidt (1999). The overparameterized analysis-of-variance model. Psychological Methods, 4, 214-233.
McCollam, K. M. Schmidt (1998). Latent trait and latent class models. In G. M. Marcoulides (Ed.) Modern methods for business research (pp. 23-46). NJ: Erlbaum.
McCollam, K. M., Embretson, S. E., Mitchell, D. W., & Horowitz, F. D. (1997). Using confirmatory factor analysis to identify newborn behavior structures of the NBAS. Infant Behavior and Development, 20, 123-131.
McCollam, K. M., Embretson, S. E., Horowitz, F. D., & Mitchell, D. W. (1996). Scoring the NBAS: To recode or not to recode. Infant Behavior and Development, 19, 63-69.
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