The following sources were consulted in the preparation of the article “15 classic habits that instantly give away you’re over 50.”
van de Vijver, I., Brinkhof, L. P., & de Wit, S. (2023). Age differences in routine formation: the role of automatization, motivation, and executive functions. Frontiers in Psychology, 14. https://doi.org/10.3389/fpsyg.2023.1140366
Luo, Y., Roberts, R. E., Yang, L., Socié, C., & Chen, Y. (2024). Routineness of social interactions is associated with higher positive affect in older adults. Journal of Gerontology: Psychological Sciences. https://pubmed.ncbi.nlm.nih.gov/38595036/
University of Pittsburgh. (2022, September 12). Older adults who maintain daily routines show better cognitive performance and mood. ScienceDaily.
https://www.sciencedaily.com/releases/2022/09/220912163802.htm
Ball, B. H., Peper, P., & Robison, M. K. (2025). Reminders eliminate age-related declines in prospective memory. Psychology and Aging, 40(1), 54–65. https://doi.org/10.1037/pag0000844
Janssen, S. M. J., Chessa, A. G., & Murre, J. M. J. (2005). The reminiscence bump in autobiographical memory: Effects of age, gender, education, and culture. Memory, 13(6), 658–668. https://doi.org/10.1080/09658210444000322
Terrier, P., & Reynard, F. (2014). Effect of age on the variability and stability of gait: A cross-sectional treadmill study in healthy individuals between 20 and 69 years of age. arXiv. https://arxiv.org/abs/1410.2098
Yoon, S. O., de Dios, I. M., & Cockburn, J. (2025). Preserved context-sensitivity in language production. Frontiers in Psychology. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12494165/ PMC
Timmermans, E. J., van der Pas, S., Schaap, L. A., Deeg, D. J. H., & Huisman, M. (2014). Self-perceived weather sensitivity and joint pain in older people with osteoarthritis: Results from the European Project on OSteoArthritis (EPOSA). BMC Musculoskeletal Disorders, 15(66). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3996041/
Völter, C., Thomas, J. P., Maetzler, W., Guthoff, R., Grunwald, M., & Hummel, T. (2021). Sensory dysfunction in old age. Deutsches Ärzteblatt International, 118(29-30), 512–520. https://doi.org/10.3238/arztebl.m2021.0212
Czaja, S. J., Boot, W. R., Charness, N., & Rogers, W. A. (2019). Designing for older adults: Principles and creative human factors approaches (3rd ed.). CRC Press. https://doi.org/10.1201/b22189
Harvard Health Publishing. (2022, August 1). The art of monotasking. Harvard Health Blog. https://www.health.harvard.edu/mind-and-mood/the-art-of-monotasking