443 Behavioral Sciences Building
1570 Campus Delivery
Colorado State University
Fort Collins, CO 80523-1570
Complete List of Publications - Last Updated September 9, 2016
I am a life-span developmental psychologist who studies processes of adult development and aging, with a particular focus on successful and healthy aging. My research interests are in three areas: (1) How adults develop an awareness of their own aging and how this awareness is linked to developmental outcomes; (2) if changing adults’ negative views on aging can facilitate the adoption of behaviors that are known to promote successful aging; and (3) how personality and social-emotional processes contribute to positive adult development and successful aging.
My primary research focuses on the concept of Awareness of Age-Related Change (AARC), which describes adults’ perceptions and understanding of their own aging process (Diehl & Wahl, 2010). I conduct this work in collaboration with my colleague, Dr. Hans-Werner Wahl, from the Division of Psychological Aging Research at the University of Heidelberg, Germany. In 2008, our theoretical work on this topic was recognized with the Social Gerontology Award of the Gerontological Society of America for best theoretical paper in Social Gerontology (Diehl & Wahl, 2010). Furthermore, in 2010 we were able to secure a research grant for our cross-national collaboration. This funding was obtained through the TransCoop-Program of the Alexander von Humboldt Foundation, Bonn, Germany. Together we have developed a reliable and valid self-report questionnaire to assess AARC and its developmental correlates.
The focus of my second research area has grown out of the work on Awareness of Age-Related Change (AARC) and addresses the question if changing middle-aged and older adults' negative views on aging can facilitate the adoption of behaviors that are known to promote successful aging. To examine this question systematically, my research staff and I have developed a psycho-educational training program called AgingPLUS with which we target adults' negative views on and negative attitudes about aging, including their negative age stereotypes. In a feasibility study, we have shown that taking part in AgingPLUS made participants' negative views on aging more positive, increased their personal control beliefs, and also resulted in a higher level of engagement in physical activity. Currently, we are expanding this program to see if similar effects can be achieved with regard to cognitive engagement, and we are conducting additional studies in which we evaluate the efficacy of AgingPLUS with larger samples of middle-aged and older adults.
My third research area focuses on how personality and social-emotional processes contribute to positive adult development and successful aging. In this area, I have done extensive work on how self-concept differentiation is related to psychological well-being and to coping with daily stress. In particular, from 2002-2011, I was the Principal Investigator on a longitudinal daily diary study with two measurement bursts which was funded by the National Institute on Aging (NIA). This study examined whether SCD operates as a vulnerability factor when adults of different ages are confronted with daily stressors, and whether the effect of SCD differs by age. Findings from this study have been published in several journals and book chapters and are discussed in the areas of stress and coping (Hay & Diehl, 2010), resilience in adulthood (Diehl & Hay, 2010; Diehl, Hay, & Chui, 2012), personality research (Diehl & Hay, 2013; Diehl & Hay, 2007), and lifespan developmental psychology (Diehl & Hay, 2011; Diehl, Youngblade, Hay, & Chui, 2011). In addition, I have done extensive work on the development of coping and defense strategies in adulthood (Diehl et al., 1996; Diehl et al., 2014).
B.S., 1980, Psychology, Rheinische Friedrich-Wilhelms University Bonn, Germany
M.S., 1984, Psychology, Rheinische Friedrich-Wilhelms University Bonn, Germany
Ph.D., 1991, Human Development and Family Studies, The Pennsylvania State University
Honors and Awards
2015 - Humboldt Research Award, Alexander von Humboldt Foundation, Bonn, Germany.
2012 - Mentorship Award, Division 20: Adult Development and Aging, American Psychological Association (APA).
2011 - Scholarly Excellence Award, College of Applied Human Sciences, Colorado State University.
2008 - Social Gerontology Award for “New Theoretical Developments in Social Gerontology,” Gerontological Society of America.
2006 - Fellow, Division 20: Adult Development and Aging, American Psychological Association.
2001 - Margret M. Baltes Early Career Award in Behavioral and Social Gerontology, Gerontological Society of America.
2001 - Fellow, Behavioral and Social Sciences Section, Gerontological Society of America.
Current Research Projects
Changing Adults' Negative Views on Aging as a Means to Facilitate Successful Aging. Humboldt Research Award from the Alexander von Humboldt Foundation, Bonn, Germany, Funding period: 2015-2016. Principal Investigator.
Development and Implementation of Standardized Facilitator Training Protocol for an Intervention to Promote Healthy Aging. Creative Works Award from CSU Ventures, Colorado State University, Funding period: 05/01/15-04/30/16. Principal Investigator.
Aging-Plus: Piloting a New Psycho-Educational Training Program. Pilot grants program of the Colorado School of Public Health, Colorado State University. Funding period: 07/01/14-06/30/15. Principal Investigator.
2015-2016: Visiting Professor, Department of Psychological Aging Research, Ruprecht-Karls-University Heidelberg, Germany.
2013-present: Faculty Affiliate, Colorado Clinical & Translational Sciences Institute (CCTSI), University of Colorado Denver—Anschutz Medical Campus, University of Colorado Boulder, and Colorado State University.
2013-present: Adjunct Professor, Department of Community and Behavioral Health, Colorado School of Public Health, University of Colorado Denver and Colorado State University.
2012: Visiting Professor, Department of Human Development and Family Studies and Center for Healthy Aging, The Pennsylvania State University.
2006-present: Professor of Human Development and Family Studies with Tenure (Graduate Faculty), Department of Human Development and Family Studies, Colorado State University.
2006-2011: Director, Center on Aging, College of Applied Human Sciences, Colorado State University.
2004-2006 : Associate Professor of Psychology with Tenure (Graduate Faculty), Department of Psychology, University of Florida.
2003-2004 : Assistant Professor of Psychology (Graduate Faculty), Department of Psychology, University of Florida.
2000-2003: Assistant Professor (Graduate Faculty), Institute on Aging, Department of Health Policy and Epidemiology, University of Florida.
1996-2000: Assistant Professor (Graduate Faculty), Department of Psychology, University of Colorado, Colorado Springs.
1993-1996: Postdoctoral Research Associate, Department of Psychology, Wayne State University.
1991-1993 : Research Associate, Ringel Institute of Gerontology, University at Albany, State University of New York (SUNY).
Diehl, M., Hooker, K., & Sliwinski, M. S. (Eds.). (2015). Handbook of Intraindividual Variability across the Life Span. New York, NY: Routledge/Taylor & Francis.
Diehl, M., & Wahl, H.-W. (Eds.). (2015). Annual Review of Gerontology and Geriatrics: Vol. 35. Subjective Aging: New Developments and Future Directions. New York, NY: Springer Publishing.
Peer-Reviewed Journal Articles:
Diehl, M., Chui, H., Hay, E. L., Lumley, M. A., Grühn, D., & Labouvie-Vief, G. (2014). Change in coping and defense mechanisms across adulthood: Longitudinal findings in a European American Sample. Developmental Psychology, 50, 634-648. doi: 10.1037/a0033619.
Diehl, M., Wahl, H.-W., Barrett, A. E., Brothers, A. F., Miche, M., Montepare, J. M., Westerhof, G. J., & Wurm S. (2014). Awareness of aging: Theoretical considerations on an emerging concept. Developmental Review, 34, 93-113. doi: 10.1016/j.dr.2014.01.001
Schilling, O., & Diehl, M. (2014). Reactivity to stressor pile-up in adulthood: Effects on daily negative and positive affect. Psychology and Aging, 29, 72-83. doi: 10.1037/a0035500
Diehl, M., & Hay, E. L. (2013). Personality-related risk and resilience factors in coping with daily stress among adult cancer patients. Research in Human Development, 10, 47-69. doi: 10.1080/15427609.2013.760259
Diehl, M., Hay, E. L., & Chui, H. (2012). Personal risk and resilience factors in the context of daily stress. In B. Hayslip & G. C. Smith (Eds.), Annual Review of Gerontology and Geriatrics: Vol. 32. Emerging perspectives on resilience in adulthood and later life (pp. 251-274). New York, NY: Springer Publishing. http://dx.doi.org/10.1891/0198-8794.32.251
Diehl, M., Hay, E. L., & Berg, K. M. (2011). The ratio between positive and negative affect and flourishing mental health across adulthood. Aging & Mental Health, 15, 882-893. doi: 10.1080/13607863.2011.569488
Hay, E. L., & Diehl, M. (2011). Emotion complexity and emotion regulation across adulthood. European Journal of Ageing, 8, 157-168. doi: 10.1007/s10433-011-0191-7
Diehl, M., & Hay, E. L. (2010). Risk and resilience factors in coping with daily stress in adulthood: The role of age, self-concept incoherence, and personal control. Developmental Psychology, 46, 1132-1146. doi: 10.1037/a0019937
Diehl, M., & Wahl, H.-W. (2010). Awareness of age-related change: Examination of a (mostly) unexplored concept. The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences, 65, S340-S350. doi: 10.1093/geronb/gbp110
Hay, E. L., & Diehl, M. (2010). Reactivity to daily stressors in adulthood: The importance of stressor type in characterizing risk and resilience factors. Psychology and Aging, 25, 118-131. doi: 10.1037/a0018747
Thematic Research Areas