Abstract
This article describes a comprehensive framework for incorporating moderator and mediator variables in program logic models and theory development as a useful way to better implement and evaluate policies and practices in the field of intellectual and developmental disabilities related (IDD). Firstly, an overview of [program] logic models in the field of IDD is provided. Secondly, we present the role of moderator and mediator variables in program logics models. Thirdly, the role of moderators and mediators is explained in relation to outcomes through a systematic review in the Web of Science. Fourthly, a discussion about the role that moderator and mediator variables play in theory development is presented. Fifthly, a comprehensive framework for incorporating moderator and mediator variables into program logic models is proposed. This comprehensive framework involves testing specific relations between well-defined and operatized moderator and/or mediator variables that may influence and impacts policies and practices’ outcomes. When mediators and moderators are considered and included in program logic models, the effect of interventions, practices and policies can be better understood and therefore enhanced.
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Arias, V. B., Gómez, L. E., Morán, L., Alcedo, M. A., Monsalve, A., & Fontanil, Y. (2018). Does quality of life differ for children with autism spectrum disorder and intellectual disability compared to children without autism? Journal of Autism and Developmental Disorders, 48(1), 123–136. https://doi.org/10.1007/s10803-017-3289-8.
Baron, R. M., & Kenny, D. A. (1986). The moderator-mediator variable distinction in social psychological research: Conceptual, strategic and statistical considerations. Journal of Personality and Social Psychology, 51, 1173–1182. https://doi.org/10.1037/0022-3514.51.6.1173.
Bollen, K. A. (1998). Structural equation models. New York: Wiley.
Bortolotti, L. (2008). An introduction to the philosophy of science. Malden, MA: Polity.
Bradley, J. (2013). When does a conceptual framework become a theory? Reflections from an accidental theorist. Evaluation and Program Planning, 38, 67–70.
Chen, H. T. (1990). Theory-driven evaluations. Newbury Park, California: Sage.
Chen, H. T. (2004). Practical program evaluation: Assessing and improving planning, implementation, and effectiveness. Thousand Oaks, CA: Sage. https://doi.org/10.1177/1356389005055528.
Claes, C., van Hove, G., Vandervelde, S., van Loon, J., & Schalock, R. L. (2012). The influence of support strategies, environmental factors, and client characteristics on quality of life-related outcomes. Research in Developmental Disabilities, 33, 93–103. https://doi.org/10.1016/j.ridd.2011.08.024.
Claes, C., Ferket, N., Vandevelde, S., Verlet, D., & De Maeyer, J. (2017). Disability policy evaluation: Combining logic models and systems thinking. Intellectual and Developmental Disabilities, 55(4), 247–257. https://doi.org/10.1352/1934-9556-55.4.247.
Cummins, R. A. (2005). Moving from the quality of life concept to a theory. Journal of Policy and Practice in Intellectual Disabilities, 49, 698–706. https://doi.org/10.1111/j.1365-2788.2005.00738.x.
Davies, R. (2004). Scale, complexity and the representation of theories of change. Special Issue: European Evaluation Society Conference, 10(1), 101–121.
De Ruysscher, C., Claes, C., Lee, T., Cui, F., van Loon, J., De Maeyer, J., & Schalock, R. L. (2017). A systems approach to social entrepreneurship. Voluntas, 28(6), 2530–2545. https://doi.org/10.1007/s11266-016-9704-5.
Donaldson, S. I. (2007). Program theory-driven evaluation science. New York: Lawrence Erlbaum Associates.
Farmer, C. (2012). Demystifying moderators and mediators in intellectual developmental disabilities research: A primer and review of the literature. Journal of Intellectual Disability Research, 56, 1148–1160.
Felce, D., & Emerson, E. (2001). Living with support in a home in the community: Predictors of behavioral development and household and community activity. Mental Retardation and Developmental Disabilities Research, 34, 23–41. https://doi.org/10.1002/mrdd.1011.
Frazier, P. A., Tix, A. P., & Barron, K. E. (2004). Testing moderator and mediator effects in counseling psychology research. Journal of Counseling Psychology, 51, 115–134. https://doi.org/10.1037/0022-0167.51.1.115.
Gardner, J. F., & Carran, D. (2005). Attainment of personal outcomes by people with developmental disabilities. Mental Retardation, 43, 157–174. https://doi.org/10.1352/0047-6765(2005)43[157:AOPOBP]2.0.CO;2.
Gómez, L. E., & Verdugo, M. A. (2016). Outcomes evaluation. En R. L. Schalock & K. D. Keith (Eds.), Cross-cultural quality of life: Enhancing the lives of persons with intellectual disability (2nd ed.) (pp. 71–80). Washington, DC: American Association on Intellectual and Developmental Disabilities.
Gómez, L. E., Verdugo, M. A., Arias, B., & Arias, V. (2011). A comparison of alternative models of individual quality of life for social service recipients. Social Indicators Research, 101, 109–126. https://doi.org/10.1007/s11205-010-9639-y.
Gómez, L. E., Arias, B., Verdugo, M. A., & Navas, P. (2012). An outcomes-based assessment of quality of life in social services. Social Indicators Research, 106, 81–93. https://doi.org/10.1007/s11205-011-9794-9.
Gómez, L. E., Verdugo, M. A., Arias, B., Navas, P., & Schalock, R. L. (2013). The development and use of provider profiles at the organization and systems level. Evaluation and Program Planning, 40, 17–26. https://doi.org/10.1016/j.evalprogplan.2013.05.001.
Gómez, L. E., Peña, E., Arias, B., & Verdugo, M. A. (2016). Impact of individual and organizational variables on quality of life. Social Indicators Research, 125(2), 649–664. https://doi.org/10.1007/s11205-014-0857-6.
Hair, J. F., Black, B., Babin, B., J., Anderson, R. E., & Tatham, R. L. (2006). Multivariate Data Analysis (6th Ed.). Upper Saddle River, New Jersey: Pearson Education Inc.
Hansen, M., Alkin, M. C., & Wallace, T. L. (2013). Depicting the logic of three evaluation theories. Evaluation and Program Planning, 38, 34–43. https://doi.org/10.1016/j.evalprogplan.2012.03.012.
Hayes, A., & Matthes, J. (2009). Computational procedures for probing interactions in OLS and logistic regression: SPSS and SAS implementations. Behavior Research Methods, 41, 924–936.
Hayes, A. F., Montoya, A. K., & Rockwood, N. J. (2017). The analysis of mechanisms and their contingencies: PROCESS versus structural equation modeling. Australasian Marketing Journal, 25, 76–81. https://doi.org/10.1016/j.ausmj.2017.02.001.
Kaplan, S. A., & Garrett, K. E. (2005). The use of logic models by community-based initiatives. Evaluation and Program Planning, 28, 167–172. https://doi.org/10.1016/j.evalprogplan.2004.09.002.
MacKinnon, D. P. (2008). Introduction to statistical mediation analysis. New York: Erlbaum.
MacKinnon, D. P. (2011). Integrating mediators and moderators in research design. Research on Social Work Practice, 21(6), 675–681. https://doi.org/10.1177/1049731511414148.
Mark, M. M. (2008). Building a better evidence base for evaluation theory: Beyond general calls to a framework of types of research on evaluation. In N. L. Smith & P. Brandon (Eds.), Fundamental issues in evaluation (pp. 111–134). New York, NY: Guilford Press.
Millar, A., Simeone, R. S., & Carnevale, J. T. (2001). Logic models: A systems tool for performance management. Evaluation and Program Planning, 24(1), 73–81. https://doi.org/10.1016/S0149-7189(00)00048-3.
Morán, L., Gómez, L. E., Malcedo, M. A., & Pedrosa, N. (2019). Gender differences in social inclusion of youth with autism and intellectual disability. Journal of Autism and Developmental Disorders, 49, 2980–2989. https://doi.org/10.1007/s10803-019-04030-z.
Muthén, B., & Asparouhov, T. (2015). Causal effects in mediation modeling: An introduction with applications to latent variables. Structural Equation Modeling: A Multidisciplinary Journal, 22(1), 12–23. https://doi.org/10.1080/10705511.2014.935843.
Newton-Smith, W. H. (Ed.). (2001). A companion to the philosophy of science. London, UK: Blackwell.
Owen, J. M. (2006). Program evaluation: Forms and approaches. Sydney: Allen and Unwin.
Perry, J., & Felce, D. (2005). Factors associated with outcomes in community group homes. American Journal on Mental Retardation, 110, 121–135. https://doi.org/10.1352/0895-8017(2005)110<121:FAWOIC>2.0.CO;2.
Preacher, K., & Hayes, A. (2004). SPSS and SAS procedures for estimating indirect effects in simple mediation models. Behavior Research Methods, Instruments, & Computers, 36, 717–731.
Rogers, P. J. (2008). Using programme theory to evaluate complicated and complex aspects of interventions. Evaluation, 14(1), 29–48.
Rosipal, R., & Krämer, N. (2006). Overview and recent advances in partial least squares. In C. Saunders, M. Grobelnik, S. Gunn, & J. Shawe-Taylor (Eds.), Subspace, latent structure and feature selection (pp. 34–51). Berlin: Springer.
Schalock, R. L. (2018). Seis ideas que están cambiando el campo de las discapacidades intelectuales y del desarrollo en todo el mundo [six ideas that are changing the IDD field internationally]. Siglo Cero, 49(1), 7–19.
Schalock, R. L., & Bonham, G. S. (2003). Measuring outcomes and managing for results. Evaluation and Program Planning, 26(3), 229–235. https://doi.org/10.1016/S0149-7189(03)00027-2.
Schalock, R. L., & Verdugo, M. A. (2012a). A leadership guide for today’s disabilities organizations: Overcoming challenges and making change happen. Baltimore: Brookes.
Schalock, R. L., & Verdugo, M. A. (2012b). A conceptual and measurement framework to guide policy development and systems change. Journal of Policy and Practice in Intellectual Disabilities, 9, 63–72.
Schalock, R. L., & Verdugo, M. A. (2013). The transformation of disabilities organizations. Intellectual and Developmental Disabilities, 51, 273–286.
Schalock, R. L., Keith, K. D., Verdugo, M. A., & Gomez, L. E. (2010). Quality of life model development and use in the field of intellectual disability. In R. Kober (Ed.), Enhancing the quality of life of people with intellectual disabilities: From theory to practice (pp. 17–32). New York: Springer.
Schalock, R. L., Verdugo, M. A. y Gómez, L. E. (2011). Evidence-based practices in the field of intellectual and developmental disabilities: An international consensus approach. Evaluation and Program Planning, 34, 273–282. https://doi.org/10.1016/j.evalprogplan.2010.10.004.
Schalock, R. L., Verdugo, M. A., Gómez, L. E., & Reinders, H. S. (2016a). Moving us toward a theory of individual quality of life. American Journal on Intellectual and Developmental Disabilities, 121, 1–12. https://doi.org/10.1352/1944-7558-121.1.1.
Schalock, R. L., Verdugo, M. A., & Lee, T. (2016b). A systematic approach to an organization’s sustainability. Evaluation and Program Planning, 56, 56–63. https://doi.org/10.1016/j.evalprogplan.2016.03.005.
Schalock, R. L., Verdugo, M. A., & Gómez, L. E. (2017). Translating the quality of life concept into practice. In N. Singh, M. L. Wehmeyer, & K. Shogren (Eds.), Handbook of positive psychology in intellectual and developmental disabilities: Translating research into practice (pp. 115–126). New York: Springer.
Schalock, R. L., Thompson, J. R., & Tassé, M. J. (2018a). A systematic approach to personal support plans. Washington, DC: American Association on Intellectual and Developmental Disabilities.
Schalock, R. L., Verdugo, M. A., & van Loon, J. (2018b). Understanding organization transformation in evaluation and program planning. Evaluation and Program Planning, 67, 53–60.
Sexton, E., King-Kallimanis, B., Layte, R., & Hickey, A. (2015). Does resilience rest on relationships? Exploring social context and personal resources as moderators of the effect of disability on quality of life in older adults. Quality of Life Research, 24(Supl. 1), 45–46.
Shogren, K. A., Luckasson, R., & Schalock, R. L. (2014). The definition of context and its application in the field of intellectual disability. Journal of Policy and Practice in Intellectual Disabilities, 11, 109–116. https://doi.org/10.1111/jppi.12077.
Shogren, K. A., Luckasson, R., & Schalock, R. L. (2015). Using context as an integrative framework to align policy goals, supports, and outcomes in intellectual disability. Intellectual and Developmental Disabilities, 53, 367–376. https://doi.org/10.1352/1934-9556-53.5.367.
Shogren, K. A., Luckasson, R., & Schalock, R. L. (2017). An integrated approach to disability policy development, implementation, and evaluation. Intellectual and Developmental Disabilities, 55(4), 258–268. https://doi.org/10.1352/1934-9556-55.4.258.
Shogren, K. A., Luckasson, R., & Schalock, R. L. (2018a). The responsibility to build contexts that enhance human functioning and promote valued outcomes for people with intellectual disability: Strengthening system responsiveness. Intellectual and Developmental Disabilities, 56, 287–300. https://doi.org/10.1352/1934-9556-56.5.287.
Shogren, K. A., Luckasson, R., & Schalock, R. L. (2018b). The use of a context-based change model to unfreeze the status quo and drive valued outcomes. Journal of Policy and Practice in Intellectual Disabilities, 15, 101–109. https://doi.org/10.1111/jppi.12233.
Shogren, K. A., Luckasson, R., & Schalock, R. L. (in press). Using a multi-dimensional model to analyze context and enhance personal outcomes. In Intellectual and developmental disabilities Retrieved from http://aaidd.org/docs/default-source/default-document-library/shogren2.pdf?sfvrsn=6b8e3621_0.
Smedema, S. M., Chan, F., Yaghmaian, R. A., Cardoso, E. D., Muller, V., Keegan, J., ..., Ebener, D. J. (2015). The Relationship of Core Self-Evaluations and Life Satisfaction in College Students with Disabilities: Evaluation of a Mediator Model. Journal of Postsecondary Education and Disability, 28(3), 341–358.
Stancliffe, R., Abery, B., & Smith, J. (2000). Personal control and the ecology of community living settings: Beyond living unit size and type. American Journal on Mental Retardation, 105(6), 431–454. https://doi.org/10.1352/0895-8017(2000)105<0431:PCATEO>2.0.CO;2.
Stride, C. B., Gardner, S. E., Catley, N., & Thomas, F. (2015). Mplus code for mediation. In Moderation and moderated mediation models Available at http://www.offbeat.group.shef.ac.uk/FIO/models_and_index.pdf.
Tassé, M. J., Schalock, R. L., Balboni, G., Bersani, H. J., Borthwick-Duffy, S. A., Spreat, S., et al. (2012). The construct of adaptive behavior: Its conceptualization, measurement, and use in the field of intellectual disability. American Journal of Intellectual and Developmental Disabilities, 117(4), 291–303. https://doi.org/10.1352/1944-7558-117.4.291.
Taylor-Powell, E., & Henert, E. (2008). Developing a logic model: Teaching and training guide. Madison: University of Wisconsin-Extension Retrieved from http://www.uwex.edu/ces/pdande/evaluation/pdf/lmguidecomplete.pdf.
Verdugo, M. A. (2018). Conceptos clave que explican los cambios en las discapacidades intelectuales y del desarrollo en España key concepts and principles that explain changes in the provision of supports for intellectual and developmental disabilities in Spain. Siglo Cero, 49(1), 35–52.
Verdugo, M. A., Navas, P., Gómez, L. E., & Schalock, R. L. (2012). The concept of quality of life and its role in enhancing human rights in the field of intellectual disability. Journal of Intellectual Disability Research, 56(2), 1036–1045. https://doi.org/10.1111/j.1365-2788.2012.01585.x.
Verdugo, M. A., Jenaro, C., Calvo, I., & Navs, P. (2017). Disability policy implementation from a cross-cultural perspective. Intellectual and Developmental Disabilities, 55(4), 234–246.
Verdugo, M. A., Fernández, M., Gómez, L. E., Amor, A., & Aza, A. (in press). Predictive factors of quality of life in acquired brain injury. International Journal of Clinical and Health Psychology. https://doi.org/10.1016/j.ijchp.2019.06.004.
Walsh, P. N., Emerson, E., Lobb, C., Hatton, C., Bradley, V., Schalock, R. L., & Moseley, C. (2010). Supported accommodation for people with intellectual disabilities and quality of life: An overview. Journal of Policy and Practices in Intellectual Disabilities, 7, 137–142.
Wang, L. &, Preacher, K. J. (2014). Moderated mediation analysis using Bayesian methods. Structural Equation Modeling: A Multidisciplinary Journal, 22(2), 249–263. https://doi.org/10.1080/10705511.2014.935256.
Wasserman, D. L. (2010). Using a systems orientation and foundational theory to enhance theory-driven human service program evaluations. Evaluation and Program Planning, 33(2), 67–80. https://doi.org/10.1016/j.evalprogplan.2009.06.005.
Zuna, N. I., Turnbull, A., & Summers, J. A. (2009). Family quality of life: Moving from measurement to application. Journal of Policy and Practices in Intellectual Disabilities, 6, 25–31.
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This work was supported by the Ministry of Economy and Competitiveness (R&D Projects, 2012, 2015) (grant number PSI2012-33139 and PSI2015-65193-P).
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Gómez, L.E., Schalock, R.L. & Verdugo, M.A. The Role of Moderators and Mediators in Implementing and Evaluating Intellectual and Developmental Disabilities-Related Policies and Practices. J Dev Phys Disabil 32, 375–393 (2020). https://doi.org/10.1007/s10882-019-09702-3
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DOI: https://doi.org/10.1007/s10882-019-09702-3