dr. F. Chakhssi (Farid)

About Me

Farid Chakhssi obtained his PhD in forensic psychology at Maastricht University on the first treatment outcome study of individuals with psychopathy, a severe form of antisocial personality disorder, in Dutch forensic psychiatry. Since 2016 he was appointed assistant professor at the department of Psychology, Health & Technology at the Faculty of Behavioural Sciences at Twente University. His main research interest are online assessment of personality disorders and evaluating (positive) psychological interventions for patients with personality disorders, mainly borderline, avoidant and dependent personality disorders.


  • Senior Researcher at GGNet – Scelta, Centre for Personality Disorders
  • Senior Researcher at GGNet – de Boog, Forensic Psychiatric Unit
  • Chair Commission for scientific research at GGNet - Scelta
  • Member Medical Ethical Committee Twente


Personality Disorders
Acceptance And Commitment Therapy


de Ruiter, C., Chakhssi, F., & Bernstein, D. P. (2015). Treating the untreatable psychopath. In C. B. Gacano (Ed.), The Clinical and Forensic Assessment of Psychopathy: A Practitioner’s Guide (2nd Edition) (pp. 388-402). New York: Routledge.
Chakhssi, F., Schaap, G. M., & de Ruiter, C. (2015). Disruptieve-, impulsbeheersing- en andere gedragsstoornissen. In H. T. van der Molen, E. Simon, & J. van Lankveld (Eds.), Klinische Psychologie: Theorieën en psychopathologie (pp. 357-371). Groningen/Houten: Noordhoff Uitgevers.
Tonnaer, F., Chakhssi, F., de Boer, M., Diependaal, M., Cima, M., & Verwaaijen, A. A. G. (2015). Forensic Recidivism Monitored: Lessons learned. In The 4th European Conference On Symptom Validity Assessment (pp. -). Maastricht: Maastricht University.
Tonnaer, F., Chakhssi, F., Schmitz, R., & Verwaaijen, A. A. G. (2015). Recidive tijdens en na behandeling in FPC de Rooyse Wissel: Een terugblik op 10 jaren behandeling. Venray: Forensisch Psychiatrisch Centrum de Rooyse Wissel.
Other Contributions


  • Chakhssi, F., Schaap, G. M., Bohlmeijer, E. T., & Westerhof, G. J. (2017). Well-being in psychotherapy for individuals with personality disorders [Invited Web Article]. American Psychological Association: Society for the advancement of Psychotherapy.
  • Schaap, G. M., Chakhssi, F. & Westerhof, G.J. (2016). Inpatient schema therapy for adults with personality pathology: Associations with changes in symptomatic distress, schemas, schema modes, coping styles and positive mental health. Psychotherapy, 53, 402-412.
  • Chakhssi, F., Janssen, W., Pol, S. M., Dreumel, M., & Westerhof, G. J. (2015). Acceptance and commitment therapy group‐treatment for non‐responsive patients with personality disorders: An exploratory study. Personality and Mental Health, 9, 345-356.
  • Chakhssi, F., Kersten, G. C. M., de Ruiter C., & Bernstein, D. P. (2014). Treating the untreatable: A single case study of a psychopathic inpatient treated with Schema Therapy. Psychotherapy, 51, 447-461.
  • Chakhssi, F., Bernstein, D. P., & Ruiter, C. (2014). Early maladaptive schemas in relation to facets of psychopathy and institutional violence in offenders with personality disorders. Legal and Criminological Psychology, 19, 356-372.


Supervising Master theses


Research projects

  • The effect of positive psychology interventions on well-being in clinical samples: A systematic review and meta-analysis.
  • The role of attachment and working alliance in the inpatient psychotherapeutic treatment of patients with personality disorders
  • Compassion focused therapy for personality disorders
  • The validity of online assessment of personality pathology

Contact Details

Visiting Address

University of Twente
Drienerlolaan 5
7522 NB Enschede
The Netherlands

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Mailing Address

University of Twente
P.O. Box 217
7500 AE Enschede
The Netherlands