Research Axis 1: Psychotherapy process research​​​​

• Fragakis, G. (2026). On becoming Lilith-allies: how the myth became a meeting place for a woman and her male therapist as they navigated gendered, religious, and male-centered conditions of worth. Person-Centered & Experiential Psychotherapies, 25(1), 1–21. https://doi.org/10.1080/14779757.2025.2480567​

• Kefalogianni, M., & Fragakis, G. (2025). Delving into deeper consciousness in person-centred therapy and research: The value of non-dual self-inquiry. In B. Flanagan & K. Clough (Eds.), The Routledge handbook of research methods in spirituality and contemplative studies (pp. 248–258). Routledge.

• Willemsen, J. (2025). The role of representational and non-representational processes in psychoanalytic therapy. Journal of Contemporary Psychotherapy, 55(2), 191-198. https://doi.org/10.1007/s10879-024-09654-6​

• Zech, E. (2025). La relation dans la thérapie centrée sur la personne [The relationship in person-centered therapy]. In A. Bioy et J. Smith (Eds.). Le grand livre de la relation thérapeutique (Chap. 16, pp. 303-320). Dunod.

• Gonçalves, M. M., Lutz, W., Schwartz, B., Oliveira, J. T., Saarni, S. E., Tishby, O., Rubel, J. A., Boehnke, J. R., Montesano, A., Paiva, D., Ceridono, D., Zech, E., Willemsen, J., Saarni, S. I., Kompan Erzar, K., Janeiro, L., Gelo, O. C. G., Errázuriz, P., Holas, P., ... Barkham, M. (2024). Developing a European Psychotherapy Consortium (EPoC): Towards adopting a single-item self-report outcome measure across European countries. Clinical Psychology in Europe, 6(3), 1-15. https://doi.org/10.32872/cpe.13827

• Willemsen, J., Rost, F., Hustinx, M., Fonagy, P., Taylor, D. (2024). Examination of a case of “treatment failure” in long-term psychoanalytic psychotherapy for treatment-resistant depression. The International Journal of Psychoanalysis, 105(4). 475-495. http://dx.doi.org/10.1080/00207578.2024.2352827​​

• Gunst, E., Desmet, M., Watson, J. C., Willemsen, J., Loeys, T., & Vanhooren, S. (2023). Sexual pleasure as forbidden secret: A single case study into emotion focused therapy with an emotionally avoidant client who committed sexual offences. Journal of Sexual Aggression, 29(1), 86-102. http://doi.org/10.1080/13552600.2021.2019845

• Willemsen, J. (2023). What is preventing psychotherapy case studies from having a greater impact on evidence-based practice, and how to address the challenges? Frontiers in Psychiatry, 13, 1-3. https://doi.org/10.3389/fpsyt.2022.1101090​

• Meganck, R., Krivzov, J., Notaerts, L., Willemsen, J., Kaluzeviciute, G., Dewaele, A., & Desmet, M., (2022). The Single Case Archive: Review of a multi-theoretical online database of published peer-reviewed single case studies. Psychotherapy, 59(4), 641-646. http://doi.org/10.1037/pst0000431​

• Berthoud, L., Zech, E., & Brison, C. (2021). L’efficacité thérapeutique des PCPE : validation, méthodes et apports. In E. Zech, G. Demaret, J. M. Priels, & Demaret-Wauters, C. (Eds.). Psychothérapie centrée sur la personne et expérientielle : Fondements et développements contemporains (Chap. 8, pp. 151-198). De Boeck Supérieur.

• Cornelis, S., Desmet, M., Meganck, R., Van Nieuwenhove, K., & Willemsen, J. (2021). Extending Blatt’s two-polarity model of personality development to dissociative identity disorder: a theory-building case study. Research in Psychotherapy: Psychopathology, Process and Outcome, 24(1), 1-13. http://doi.org/10.4081/ripppo.2021.505

• Willemsen, J. (2021). Trauma, victimhood and subjectivity. Psychoanalytische Perspectieven, 39(4), 555-572.

• Zech, E., Demaret, G., Priels, J.-M., & Demaret, C. (Eds.). (2021). La psychothérapie centrée sur la personne et expérientielle : Fondements et développements contemporains. [Person-centred and experiential psychotherapies : Fundations and contemporary developments]. De Boeck Supérieur.

• Zech, E. (2021). Les conditions nécessaires et suffisantes au changement thérapeutique. In E. Zech, G. Demaret, J. M. Priels, & Demaret-Wauters, C. (Eds.). Psychothérapie centrée sur la personne et expérientielle : Fondements et développements contemporains (Chap. 3, pp. 63-80). De Boeck Supérieur.​

• Gunst, E., Watson, J., Willemsen, J., Desmet, M., Loeys, T., & Vanhooren, S. (2020). A quest for self‐soothing: A systematic case study into emotion‐focused therapy with an emotionally avoidant client who committed sexual offenses. Journal of Clinical Psychology, 76(4), 676-687. http://doi.org/10.1002/jclp.22906

• Ogez, D., de Timary, P., Maddalena, F., Gundermann, N., Lannoy, V., & Zech, E. (2020). Can we change patients’ perception of the psychologist to promote support in oncology? Randomized impact study of the psycho-oncology intervention. Psychooncologie, 13, 136-143. http://doi.org/10.3166/pson-2019-0098

• Zech, E. (2020). La relation psychothérapeutique. In M. Mikolajczak, E. Zech, & I. Roskam (Eds.). Burn-out professionnel, parental et de l’aidant : Comprendre, prévenir et intervenir (Chap. 8, pp.119-135). Louvain-la-Neuve : De Boeck Supérieur.​

• Gunst, E., Willemsen, J., Desmet, M., Watson, J. C., Loeys, T., & Vanhooren, S. (2019). Into the Wild, Out of the Woods: A Systematic Case Study on Facilitating Emotional Change. International Journal of Offender Therapy and Comparative Criminology, 63(15-16), 2586-2610. http://doi.org/10.1177/0306624x19866977

• Gunst, E., Watson, J.C., Willemsen, J., & Desmet, M. (2019). The role of affect regulation in the treatment of people who have committed sexual offenses. Aggression and Violent Behavior, 44(1), 99-110. http://doi.org/10.1016/j.avb.2018.10.008

• Xhrouet, A., Gillain, B., & Zech, E. (2019). Les conditions nécessaires et suffisantes à la modification positive de la personnalité selon Carl Rogers intégrées à la pratique avec le patient souffrant de psychose [Carl Rogers’ necessary and sufficient conditions for a positive personality modification among psychotic patients]. Acta Psychiatrica Belgica, 119(3), 35-44.