Publications

Our research on the role of motivation in adaptive development across the adult lifespan has been featured in scientific journals that include: Psychological Science, Motivation Science, Annals of Behavioral Medicine, Health Psychology, Psychology and Aging, and The Journals of Gerontology among others. 

 Selected Publications (N Total = 64) 

• Hamm, J. M., Lachman, M. E., Klepacz, L. K., & Hama-Amin, D. S. (2026, in press). Coupled changes in daily control beliefs and cognition: Variations by education and income. International Journal of Behavioral Development. https://doi.org/10.1177/01650254261454866 

• Klepacz, L. K., Cerino, E. S., Mogle, J. A., Hamm, J. M. (2026). Perceived control buffers against variability in day-to-day cognition in midlife and older age. Journals of Gerontology, Series B: Psychological Sciences and Social Sciences, 81(3), gbaf265. https://doi.org/10.1093/geronb/gbaf265

• Hamm, J. M., Lachman, M. E., McGrath, R., Duggan, K. A., & Parker, K. (2025). Combinations of light, moderate, and vigorous physical activity in midlife and old age: Implications for healthy cognitive aging. Annals of Behavioral Medicine, 59, kaaf064. https://doi.org/10.1093/abm/kaaf064 

• Hamm, J. M., Lachman, M. E., Duggan, K. A., Mogle, J. A., McGrath, R., Parker, K. P., & Klepacz, L. M. (2025). When and how perceived control buffers against cognitive declines: A moderated mediation analysis. Psychology and Aging, 40, 39-53. https://psycnet.apa.org/doi/10.1037/pag0000841 

• Hamm, J. M., Turner, J. R., Lachman, M. E., Klepacz, L. M., Pierce, M. J., & Parker, K. P. (2025). Patterns of perceived control that buffer against cognitive decline in midlife and old age. Journals of Gerontology, Series B: Psychological Sciences and Social Sciences, 80(7), gbaf081. https://doi.org/10.1093/geronb/gbaf081 

• Hamm, J. M., Parker, K. P., Lachman, M. E., Mogle, J. A., Duggan, K. A., & McGrath, R. (2024). Increased frequency of light physical activity during midlife and old age buffers against cognitive declines. Journal of Behavioral Medicine, 47, 622-634. https://doi.org/10.1007/s10865-024-00478-2 

• Hamm, J. M., Wrosch, C., Barlow, M. A., & Kunzmann, U. (2021). A tale of two emotions: The diverging salience and health consequences of calmness and excitement in old age. Psychology and Aging. doi:10.1037/pag0000512

• Hamm, J. M., Heckhausen, J., Shane, J., & Lachman, M. E. (2020). Risk of cognitive declines with retirement: Who declines and why? Psychology and Aging, 35, 449-457. doi:10.1037/pag0000453. *Study highlighted in APA press release 

• Hamm, J. M., Perry, R. P., Chipperfield, J. G., Hladkyj, S., Parker, P. C., & Weiner, B. (2020). Reframing achievement setbacks: A motivation intervention to improve eight-year graduation rates for students in STEM fields. Psychological Science, 31, 623-633. doi:10.1177/0956797620904451. *Study highlighted in APS Observer. 

• Hamm, J. M., Heckhausen, J., Shane, J., Infurna, F. J., & Lachman, M. E. (2019). Engagement with six major life domains during the transition to retirement: Stability and change for better or worse. Psychology and Aging, 34, 441-456. doi:10.1037/pag0000343 

• Hamm, J. M., Kamin, S. T., Chipperfield, J. G., Perry, R. P., & Lang, F. R. (2019). The detrimental consequences of overestimating future health in late life. The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences, 74, 373-381. doi:10.1093/geronb/gbx074. *Editor’s Choice Article