Created by the One-Size-Fits-None (OSFN) research group:
Baljinder K. Sahdra, Cristóbal Hernández, Clarissa Ong, Joseph Ciarrochi, & Steven C. Hayes
An idionomic approach combines individual-level (idiographic) and group-level (nomothetic) analyses. The individual is modeled first, and group-level generalizations are only made if they are consistent with individual patterns of behavior.
Source: Hayes, S. C., Hernández, C., Ciarrochi, J., Hofmann, S. G., Ong, C., Sahdra, B. K. (in press, accepted on July 9, 2025). Idionomic analysis in translational research in behavior analysis: Creating a two-way relationship between basic and applied behavioral science. In G. J. Madden & F. D. Digennaro Reed (Eds). APA handbooks in psychology: APA Handbook of behavior analysis, 2nd Edition, Volume 2: Translational research, applied principles and values, and child applications. Washington, DC: American Psychological Association.
https://github.com/cristobalehc/idionomics
Citation:
Hernández, C., Ciarrochi, J., Hayes, S., & Sahdra, B. K. (2025). idionomics (R package). GitHub. https://github.com/cristobalehc/idionomics
The idionomics package simplifies the implementation of idionomic methods. Just a couple of lines of code, and you're ready to go.
Sahdra, B. K., Woolley, M. G., Hernández, C., Li, W., Hayes, S. C., Ciarrochi, J., Twohig, M. P., & Levin, M. E. (2026). Time series machine learning for idionomic process-based treatment planning: A tutorial on tsBoruta. Journal of Contextual Behavioral Science, 100983*.* https://doi.org/10.1016/j.jcbs.2026.100983
Yee, H. F., Fraser, M. I., Ciarrochi, J., Sahdra, B. K., Yap, K., Hayes, S. C., Hernández, C., & Gloster, A. T. (2026). Beyond the average: Idionomic evidence of individual-specific variability in the psychological flexibility-mood relationship. Journal of Contextual Behavioral Science, 100993*.* https://doi.org/10.1016/j.jcbs.2026.100993
Fraser, M. I., Field, K., Ciarrochi, J., Hernández, C., Krafft, J., Klimczak, K., Levin, M. E., Yap, K., Hayes, S. C., & Sahdra, B. K. (2026). Heterogeneity in the Links of Psychological (In) Flexibility Subprocesses and Well-being: Idionomic Insights from an Experience Sampling Study. Journal of Contextual Behavioral Science, 100984. https://doi.org/10.1016/j.jcbs.2026.100984
Sahdra, B. K., Shin, A., Fraser, M., Levin, M. E., Klimczak, K. S., Krafft, J., Hayes, S. C., Hernández, C., & Ciarrochi, J. (2025). One size does not make all happy: Idionomic links between striving for positive states and happiness in experience sampling. Journal of Happiness Studies, 26:101. https://doi.org/10.1007/s10902-025-00933-0
Catts, N. V., Sahdra, B. K., Ciarrochi, J., Fraser, M. I., Hernández, C., Hayes, S. C., & Gloster, A. T. (2025). Distinct Pathways to Well-Being: Exploring Valued Action and Mood Among Stoics and Non-Stoics. Journal of Contextual Behavioral Science, 100898. https://doi.org/10.1016/j.jcbs.2025.100898
Woolley, M. G., Sahdra, B.K., Bowers, E.M., Capel, L.K., Twohig, M. P., & Levin, M.E. (2025). An indionomic network analysis of trichotillomania treatment targets: Gathering group-level and individual-level insights to inform a personalized therapeutic framework. Behavior Therapy. https://doi.org/10.1016/j.beth.2025.01.006