Single case experimental designs in agricultural advisor training: A novel method for evaluating capacity building in farmer mental health interventions
DOI:
https://doi.org/10.37433/aad.v7i2.657Keywords:
Ireland, well being, agricultural advisor, SDG 3: Good Heath and Well-beingAbstract
Extant research supporting digital mental health interventions for farmers and the successful delivery of psychological interventions by laypeople is predominantly nomothetic (aggregate, group-level). Since conclusions we draw from inter-individual data may not apply at the intra-individual level, it is important to cultivate a diverse evidence base for these topics. Adding alternative methods, such as idiographic (individual-level) single-case experimental designs is imperative. Akin to a pilot randomized-controlled trial, the present study examined the feasibility and suitability of a quasi-randomized multiple-baseline single-case experimental design for testing agricultural advisors’ experiences of training in a digital acceptance and commitment therapy intervention. 18 agricultural advisors enrolled in the study and were asked to (i) complete a three-item measure daily for 55 days, (ii) attend two 2.5-hour training sessions via Zoom, and (iii) complete three longer surveys preintervention (Time 1), immediately after the intervention (Time 2), and three months postintervention (Time 3). Appropriate participant retention, data missingness, and errors were observed, suggesting that the present method is feasible and suitable. In addition, outcomes were generally consistent with expectations at the nomothetic level at Times 2 and 3. Future research should employ single-case experimental designs and target various levels of analysis (psychological, sociocultural, and biophysiological).
Downloads
References
Abbott, J. H. (2014). The distinction between randomized clinical trials (RCTs) and preliminary feasibility and pilot studies: What they are and are not. Journal of Orthopaedic & Sports Physical Therapy, 44(8), 555-558. https://doi.org/10.2519/jospt.2014.0110 DOI: https://doi.org/10.2519/jospt.2014.0110
Arnold, T., Haubrick, K. K., Klasko-Foster, L. B., Rogers, B. G., Barnett, A., Ramirez-Sanchez, N. A., Bertone, Z., & Gaudiano, B. A. (2022). Acceptance and commitment therapy informed behavioral health interventions delivered by non-mental health professionals: A systematic review. Journal of Contextual Behavioral Science, 24(1), 185-196. https://doi.org/10.1016/j.jcbs.2022.05.005 DOI: https://doi.org/10.1016/j.jcbs.2022.05.005
Assmann, L., Pasi, H. J., Gillanders, D. T.& Mottus, R. (August 28-29, 2018). The brief acceptance measure: Development and initial validation of an ultra-brief measure of psychological flexibility, suitable for daily use [Paper presentation]. The Chester Contextual Behavioural Science Research Colloquium, University of Chester, United Kingdom.
Cheung, F., & Lucas, R. E. (2014). Assessing the validity of single-item life satisfaction measures: Results from three large samples. Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care, and Rehabilitation, 23(10), 2809–2818. https://doi.org/10.1007/s11136-014-0726-4 DOI: https://doi.org/10.1007/s11136-014-0726-4
Ciarrochi, J., Sahdra, B., Hofmann, S. G., & Hayes, S. C. (2022). Developing an item pool to assess processes of change in psychological interventions: The process-based assessment tool (PBAT). Journal of Contextual Behavioral Science, 23(1), 200–213. https://doi.org/10.1016/j.jcbs.2022.02.001 DOI: https://doi.org/10.1016/j.jcbs.2022.02.001
Cox, G., Stapleton, A., Russell, T., McHugh, L., & Kavalidou, K. (2025). Probable suicide among men in farming- and agricultural-related occupations in the Republic of Ireland: Exploring coronial data. Journal of Agromedicine, 30(4), 801–811. https://doi.org/10.1080/1059924X.2025.2498339 DOI: https://doi.org/10.1080/1059924X.2025.2498339
Francis, A. W., Dawson, D. L., & Golijani-Moghaddam, N. (2016). The development and validation of the comprehensive assessment of acceptance and commitment therapy processes (CompACT). Journal of Contextual Behavioral Science, 5(3), 134–145. https://doi.org/10.1016/j.jcbs.2016.05.003 DOI: https://doi.org/10.1016/j.jcbs.2016.05.003
Gloster, A. T., Block, V. J., Klotsche, J., Villanueva, J., Rinner, M. T. B., Benoy, C., Walter, M., Karekla, M., & Bader, K. (2021). Psy-flex: A contextually sensitive measure of psychological flexibility. Journal of Contextual Behavioral Science, 22, 13–23. https://doi.org/10.1016/j.jcbs.2021.09.001 DOI: https://doi.org/10.1016/j.jcbs.2021.09.001
Gunn, K. M., Skaczkowski, G., Dollman, J., Vincent, A. D., Brumby, S., Short, C. E., & Turnbull, D. (2023). A self-help online intervention is associated with reduced distress and improved mental wellbeing in Australian farmers: The evaluation and key mechanisms of www. ifarmwell.com.au. Journal of Agromedicine, 28(3), 378–392. https://doi.org/10.1080/1059924X.2022.2156642 DOI: https://doi.org/10.1080/1059924X.2022.2156642
Hammersley, C., Richardson, N., Meredith, D., McNamara, J., Carroll, P., & Jenkins, P. (2025). On Feirm ground, supporting farmer mental health: Analysing the effectiveness of a bespoke farmer mental health training programme targeted at farm advisors in Ireland. The Journal of Agricultural Education and Extension, 31(1), 90–118. https://doi.org/10.1080/1389224X.2024.2339801 DOI: https://doi.org/10.1080/1389224X.2024.2339801
Hayes, S. C., Hofmann, S. G., & Ciarrochi, J. (2020). A process-based approach to psychological diagnosis and treatment: The conceptual and treatment utility of an extended evolutionary meta model. Clinical Psychology Review, 82(1), 101908. https://doi.org/10.1016/j.cpr.2020.101908 DOI: https://doi.org/10.1016/j.cpr.2020.101908
Keyes, C. L. M., Wissing, M., Potgieter, J., Temane, M., Kruger, A., & van Rooy, S. (2008). Evaluation of the mental health continuum-short form (MHC-SF) in Setswana-speaking South Africans. Clinical Psychology and Psychotherapy, 15, 181–192. https://doi.org/10.1002/cpp.572 DOI: https://doi.org/10.1002/cpp.572
Lamers, S. M., Westerhof, G. J., Bohlmeijer, E. T., ten Klooster, P. M., & Keyes, C. L. (2011). Evaluating the psychometric properties of the mental health continuum-short form (MHC-SF). Journal of Clinical Psychology, 67(1), 99–110. https://doi.org/10.1002/jclp.20741 DOI: https://doi.org/10.1002/jclp.20741
Lavelle, J., Storan, D., Eswara Murthy, V., De Dominicis, N., Mulcahy, H. E., & McHugh, L. (2022). Brief and telehealth acceptance and commitment therapy (ACT) interventions for stress in inflammatory bowel disease (IBD): A series of single case experimental design (SCED) studies. Journal of Clinical Medicine, 11(10), 2757. https://doi.org/10.3390/jcm11102757 DOI: https://doi.org/10.3390/jcm11102757
O’Connor, S., O’Hagan, A. D., Casey, H., O’Connor, A., Creegan, M., Stapleton, A., McHugh, L., Russell, T., & O'Keeffe, S. (2025). Between the farm and family: A cross-sectional survey on work–family conflict in farmers in Ireland. Agriculture, 15(15), 1587. https://doi.org/10.3390/agriculture15151587 DOI: https://doi.org/10.3390/agriculture15151587
Peng, C.-Y. J., & Chen, L.-T. (2021). Assessing intervention effects in the presence of missing scores. Education Sciences, 11(2), 76. https://doi.org/10.3390/educsci11020076 DOI: https://doi.org/10.3390/educsci11020076
Russell, T., Stapleton, A., Markey, A., & McHugh, L. (2023). Dying to farm: Developing a suicide prevention intervention for farmers in Ireland. Health Service Executive National Office for Suicide Prevention. https://www.hse.ie/eng/services/list/4/mental-health-services/connecting-for-life/publications/grant-scheme-paper-11.pdf
Ryan, R. M., & Frederick, C. (1997). On energy, personality, and health: Subjective vitality as a dynamic reflection of well‐being. Journal of Personality, 65(3), 529–565. https://doi.org/10.1111/j.1467-6494.1997.tb00326.x DOI: https://doi.org/10.1111/j.1467-6494.1997.tb00326.x
Stynes, G., Stapleton, A., Moore, B., Russell, T., O’Connor, M., Richardson, N., Ruiz, F. J., & McHugh, L. (2025). Effectiveness of a process-based approach to farmer wellbeing: A randomized multiple baseline single-case experimental design. Journal of Contextual Behavioral Science, 100932. https://doi.org/10.1016/j.jcbs.2025.100932 DOI: https://doi.org/10.1016/j.jcbs.2025.100932
Ware, J. E., Jr., & Sherbourne, C. D. (1992). The MOS 36-item short-form health survey (SF-36). I. Conceptual framework and item selection. Medical Care, 30(6), 473–483. DOI: https://doi.org/10.1097/00005650-199206000-00002
West, C. P., Dyrbye, L. N., Sloan, J. A., & Shanafelt, T. D. (2009). Single-item measures of emotional exhaustion and depersonalization are useful for assessing burnout in medical professionals. Journal of General Internal Medicine, 24(12), 1318–1321. https://doi.org/10.1007/s11606-009-1129-z DOI: https://doi.org/10.1007/s11606-009-1129-z
Young, Q. R., Ignaszewski, A., Fofonoff, D., & Kaan, A. (2007). Brief screen to identify 5 of the most common forms of psychosocial distress in cardiac patients: Validation of the screening tool for psychological distress. The Journal of Cardiovascular Nursing, 22(6), 525–534. https://doi.org/10.1097/01.JCN.0000297383.29250.14 DOI: https://doi.org/10.1097/01.JCN.0000297383.29250.14
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2026 Alison Stapleton, Barbara Moore, Greg Stynes, Noel Richardson, Tomas Russell, Louise McHugh

This work is licensed under a Creative Commons Attribution 4.0 International License.