Additional bibliography for study
-Hofer, S., & Alwin, D. (2008). Handbook of Cognitive Aging: Interdisciplinary perspectives. Thousand Oaks, California, U.S.: Sage.
-MacKinnon, D. (2008). Introduction to statistical mediation analysis. New York, NY, U.S.: Lawrence Erlbaum Associates.
-Kline, R. (2005). Principles and practice of Structural Equation Modeling (2nd ed.). New York, NY, U.S.: Guilford.
-Bengtson, V., Gans, D., Putney, N., & Silverstein, M. (eds.) (2009). Handbook of theories of aging (2nd ed.). New York, U.S.A.: Springer.
-Field, A. & Hole, G. (2003). How to design and report experiments. Thousand Oaks,
California, U.S.A.: Sage.