Utvalgte publikasjoner

• Lorentzen, S.  (2003). Long-term analytic group psychotherapy with outpatients.  Evaluation of process and change.  Doctoral thesis. University of Oslo.
• Lorentzen, S., & Høglend, P. (2008). Moderators of the effects of treatment length in long-term psychodynamic group psychotherapy. Psychotherapy & Psychosomatics, 77, 321-322.
• Bakali, J.V., Baldwin, S.A., & Lorentzen, S. (2009). Modeling group process constructs at three stages in group psychotherapy. Psychotherapy Research, 19(3), 332-343.
• Bakali, J.V., Wilberg, T., Hagtvet, K.A., & Lorentzen, S. (2009). Sources accounting for of alliance and cohesion at three stages in group psychotherapy. Variance component analyses. Group Dynamics: Theory, Research, and Practice 2010, 14(4), 368-383.
• Lorentzen, S., Bakali, J.V., Hersoug, A. G., Hagtvet, K.A., Ruud, T., & Høglend, P. (2012). Psychodynamic group psychotherapy: Impact of group length and therapist professional characteristics on development of therapeutic alliance. Clinical Psychology and Psychotherapy, 19, 420-433.
• Horneland, M., Børnes, D.S., Høbye, K., Knutsen, H., & Lorentzen, S. (2012). Can the clinician-researcher gap be bridged? Experiences from a randomized clinical trial in analytic/dynamic group psychotherapy. Group Analysis 45(1), 84-98.
• Lorentzen., Ruud, T., Fjeldstad, A., & Høglend, P. (2013). Comparison of short- and long-term dynamic group psychotherapy: Randomised clinical trial. British Journal of Psychiatry, 203, 280-287.
• Bakali, J.V., Wilberg, T., Klungsøyr, O., & Lorentzen, S. (2013). Development of group climate in short- and long-term psychodynamic group psychotherapy. International Journal of Group Psychotherapy, 63(3), 367-393.
• Lorentzen., Ruud, T., Fjeldstad, A., & Høglend, P. (2015). Personality disorder moderates outcome in short- and long-term group analytic psychotherapy: a randomized clinical trial. British Journal of Clinical Psychology, 54, 129-146.
• Lorentzen, S., Fjeldstad, A., Ruud, T., & Høglend, P. (2015). Comparing short- and long-term group therapy: seven-year follow-up of a randomized clinical trial. Psychotherapy and Psychosomatics, 84(5), 320-321.
• Lorentzen, S., Fjeldstad, A., Ruud, T., Marble, A., Klungsøyr, O., Ulberg, R., & Høglend, P.A. (2015). The effectiveness of short- and long-term psychodynamic group psychotherapy on self-concept: Three years follow-up of a randomized clinical trial. Int J of Group Psychotherapy, 65(4), 543-551.
• Fjeldstad, A., Høglend, P.A., Lorentzen, S. (2016). Presence of personality disorder moderates the long-term effects of short-term and long-term psychodynamic group therapy. A 7-year follow-up of a randomized clinical trial. Group Dynamics: theory, research, and practice, 20(4), 294-306.
• Fjeldstad, A., Høglend, P.A., Lorentzen, S. (2017). Patterns of change in interpersonal problems during and after short-term and long-term psychodynamic group therapy: A randomized clinical trial. Psychotherapy Research, 27(3), 350-361.
• Lorentzen, S. (2018). Korttids Fokusert Gruppeanalytisk Psykoterapi- Et eksempel på ‘anvendt psykoanalyse’. Tidsskrift for Norsk Psykologforening, 410-418.
• Lorentzen, S., Strauss, B., & Altmann, U. (2018). Process-Outcome Relationships in Short- and Long-Term Psychodynamic Group Psychotherapy: Results from a Randomized Clinical Trial. Group Dynamics: Theory, Research, and Practice. 22(2), 93-107.
• Lorentzen, Steinar. (2020). Short-term focused group-analytic psychotherapy (SFGAP): An integrative approach to change based on research. Group Analysis, 53(3), 343-360.

Bøker

• Lorentzen, S. (2013). Group Analytic Psychotherapy. Working with affective, anxiety and personality disorders. London & New York:  Routledge.
• Lorentzen, S. (2020). Fokusert Gruppeanalytisk Psykoterapi. En integrasjon av klinisk erfaring of forskning. Oslo, Norway: Gyldendal Akademika.
• Focused group Analytic Psychotherapy. An Integration of Clinical Experience and Research. (2022) London & NewYork: Routledge. In Press.