Steinar Lorentzen

• Lorentzen, Steinar (2022). Focused group analytic psychotherapy: An integration of clinical experience and research. Journal of Clinical Psychology. ISSN 0021-9762. 78(8), p. 1613–1623. doi: 10.1002/jclp.23397. Full text in Research Archive
• Pedersen, Geir Feigum; Kvarstein, Elfrida Hartveit; Wilberg, Theresa; Folmo, Espen; Burlingame, Gary M. & Lorentzen, Steinar (2021). The Group Questionnaire (GQ)—Psychometric Properties Among Outpatients With Personality Disorders. Group Dynamics. ISSN 1089-2699. doi: 10.1037/gdn0000176. Full text in Research Archive
• Lorentzen, Steinar (2020). Short-term focused group-analytic psychotherapy (SFGAP): An integrative approach to change based on research. Group Analysis. ISSN 0533-3164. doi: 10.1177/0533316420901433.
• Lorentzen, Steinar (2018). Korttids Fokusert Gruppeanalytisk Psykoterapi. Tidsskrift for Norsk Psykologforening. ISSN 0332-6470. 55(6), p. 428–436.
• Lorentzen, Steinar; Strauss, Bernhard & Altmann, Uwe (2018). Process-outcome relationships in short- and long-term psychodynamic group psychotherapy: Results from a randomized clinical trial. Group Dynamics. ISSN 1089-2699. 22(2), p. 93–107. doi: 10.1037/gdn0000084.
• Church, Chelsea; Andreassen, Ole Andreas; Lorentzen, Steinar; Melle, Ingrid & Aas, Monica (2017). Childhood trauma and minimization/denial in people with and without a severe mental disorder. Frontiers in Psychology. ISSN 1664-1078. 8. doi: 10.3389/fpsyg.2017.01276.
• Fjeldstad, Anette; Høglend, Per Andreas & Lorentzen, Steinar (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. ISSN 1089-2699. 20(4), p. 294–309. doi: 10.1037/gdn0000055.
• Fjeldstad, Anette; Høglend, Per Andreas & Lorentzen, Steinar (2015). Patterns of Change in Interpersonal Problems During and After Short-term and Long-term Psychodynamic Group Therapy: A Randomized Clinical Trial. Journal of Psychotherapy Practice and Research (JPPR). ISSN 1055-050X. 27(3), p. 350–361. doi: 10.1080/10503307.2015.1102357.
• Lorentzen, Steinar; Wilberg, Theresa & Martinsen, Egil Wilhelm (2015). Group psychotherapy in Norway. International journal of group psychotherapy. ISSN 0020-7284. 65(4), p. 543–551. doi: 10.1521/ijgp.2015.65.4.543.
• Suszek, Hubert; Holas, Paweł; Wyrzykowski, Tomasz; Lorentzen, Steinar & Kokoszka, Andrzej (2015). Short-term intensive psychodynamic group therapy versus cognitive-behavioral group therapy in day treatment of anxiety disorders and comorbid depressive or personality disorders: Study protocol for a randomized controlled trial. Trials. ISSN 1745-6215. 16:319. doi: 10.1186/s13063-015-0827-6.
• Lorentzen, Steinar; Fjeldstad, Anette; Ruud, Torleif; Marble, Alice Ruth; Klungsøyr, Ole & ULBERG, RANDI [Show all 7 contributors for this article] (2015). The Effectiveness of Short- and Long-Term Psychodynamic Group Psychotherapy on Self-Concept: Three Years Follow-Up of a Randomized Clinical Trial . International journal of group psychotherapy. ISSN 0020-7284. 65(3), p. 362–85. doi: 10.1521/ijgp.2015.65.3.362.
• Lorentzen, Steinar (2014). Økt interesse for forskning i psykoanalyse og psykodynamisk terapi. Matrix. ISSN 0109-646X. 31(4), p. 226–245.
• Lorentzen, Steinar; Ruud, Torleif; Fjeldstad, Anette & Høglend, Per Andreas (2014). Personality disorder moderates outcome in short- and long-term group analytic psychotherapy: A randomized clinical trial. British Journal of Clinical Psychology. ISSN 0144-6657. 54(2), p. 129–146. doi: 10.1111/bjc.12065. Show summary

  Objectives. In a randomized clinical trial, short- and long-term psychodynamic group psychotherapy (STG and LTG, respectively) schedules were equally effective for the ‘typical’ patient during a 3-year study period. Although several studies have reported good effects for patients with personality disorders (PD) in diverse forms of psychotherapy, the significance of treatment duration is unclear. Therefore, we tested the hypothesis that PD patients would improve more during and after LTG than STG. Design. A randomized, longitudinal, prospective study contrasting the outcomes during and after short- and long-term dynamic group psychotherapies. Methods. One hundred and sixty-seven outpatients with mood disorders, anxiety disorders, orPDwere randomized to STG or LTG (respectively, 20 or 80 weekly sessions of 90 min each). Outcome measures are as follows: symptoms (SCL-90-R), interpersonal problems (IIP-C), and psychosocial functioning (GAF split version: GAF-Symptom and GAF-Function). PD pathology (number of PD criteria items) was selected a priori as a putative moderator of treatment effects. Change during the 3-year study period was assessed using linear mixed models. The study was registered at ClinicalTrials.gov asNCT 00021417. Results. Our hypothesis was supported, as patients with PD improved significantly more regarding all outcome variables in LTG than STG. For patients without PD, the rate of change was similar across 3 years; however, the rate of change in symptoms and interpersonal problems was higher in STG during the first 6 months. Conclusions. The effectiveness of LTG is higher for patients with co-morbid PD. Patients without PD do not appear to experience additional gain from LTG.

• Steen, Nils Eiel; Methlie, Paal; Lorentzen, Steinar; Dieset, Ingrid; Aas, Monica & Nerhus, Mari [Show all 11 contributors for this article] (2014). Altered systemic cortisol metabolism in bipolar disorder and schizophrenia spectrum disorders. Journal of Psychiatric Research. ISSN 0022-3956. 52(1), p. 57–62. doi: 10.1016/j.jpsychires.2014.01.017.
• Lorentzen, Steinar & Ruud, Torleif (2014). Group therapy in public mental health services: Approaches, patients and group therapists. Journal of Psychiatric and Mental Health Nursing. ISSN 1351-0126. 21(3), p. 219–225. doi: 10.1111/jpm.12072.
• Knutzen, Maria; Bjørkly, Stål; Eidhammer, Gunnar; Lorentzen, Steinar; Mjøsund, Nina Helen & Ilner, Stein E. Opjordsmoen [Show all 8 contributors for this article] (2014). Characteristics of patients frequently subjected to pharmacological and mechanical restraint—A register study in three Norwegian acute psychiatric wards. Psychiatry Research. ISSN 0165-1781. 215(1), p. 127–133. doi: 10.1016/j.psychres.2013.10.024.
• Peleikis, Dawn Elisabeth; Varga, Monica; Sundet, Kjetil Søren; Lorentzen, Steinar; Agartz, Ingrid & Andreassen, Ole Andreas (2013). Schizophrenia patients with and without Post-traumatic Stress Disorder (PTSD) have different mood symptom levels but same cognitive functioning. Acta Psychiatrica Scandinavica. ISSN 0001-690X. 127(6), p. 455–463. doi: 10.1111/acps.12041.
• Hersoug, Anne Grete; Høglend, Per Andreas; Gabbard, Glen O. & Lorentzen, Steinar (2013). The combined predictive effect of patient characteristics and alliance on long-term dynamic and interpersonal functioning after dynamic psychotherapy. Clinical Psychology and Psychotherapy. ISSN 1063-3995. 20(4), p. 297–307. doi: 10.1002/cpp.1770.
• Etain, B; Aas, Monica; Andreassen, Ole Andreas; Lorentzen, Steinar; Dieset, Ingrid & Gard, Sebastien [Show all 11 contributors for this article] (2013). Childhood Trauma Is Associated With Severe Clinical Characteristics of Bipolar Disorders. Journal of Clinical Psychology. ISSN 0021-9762. 74(10), p. 991–998. doi: 10.4088/JCP.13m08353.
• Lorentzen, Steinar; Ruud, Torleif; Fjeldstad, Anette & Høglend, Per Andreas (2013). Comparison of short- and long-term dynamic group psychotherapy: randomised clinical trial. British Journal of Psychiatry. ISSN 0007-1250. 203(4), p. 280–287. doi: 10.1192/bjp.bp.112.113688.
• Mork, Erlend; Walby, Fredrik A; Harkavy-Friedman, Jill M.; Barrett, Elizabeth Ann; Steen, Nils Eiel & Lorentzen, Steinar [Show all 9 contributors for this article] (2013). Clinical characteristics in schizophrenia patients with or without suicide attempts and non-suicidal self-harm - a cross-sectional study. BMC Psychiatry. ISSN 1471-244X. 13. doi: 10.1186/1471-244X-13-255. Full text in Research Archive
• Knutzen, Maria; Bjørkly, Stål; Eidhammer, Gunnar; Lorentzen, Steinar; Mjøsund, Nina Helen & Ilner, Stein E. Opjordsmoen [Show all 8 contributors for this article] (2013). Mechanical and pharmacological restraints in acute psychiatric wards - why and how are they used? Psychiatry Research. ISSN 0165-1781. 209(1), p. 91–97. doi: 10.1016/j.psychres.2012.11.017. Show summary

  Restraint use has been reported to be common in acute psychiatry, but empirical research is scarce concerning why and how restraints are used. This study analysed data from patients' first episodes of restraint in three acute psychiatric wards during a 2-year study period. Logistic regression analyses were used to identify predictors for type and duration of restraint. The distribution of restraint categories for the 371 restrained patients was as follows: mechanical restraint, 47.2%; mechanical and pharmacological restraint together, 35.3%; and pharmacological restraint, 17.5%. The most commonly reported reason for restraint was assault (occurred or imminent). It increased the likelihood of resulting in concomitant pharmacological restraint. Female patients had shorter duration of mechanical restraint than men. Age above 49 and female gender increased the likelihood of pharmacological versus mechanical restraint, whereas being restrained due to assault weakened this association. Episodes with mechanical restraint and coinciding pharmacological restraint lasted longer than mechanical restraint used separately, and were less common among patients with a personality disorder. Diagnoses, age and reason for restraint independently increased the likelihood for being subjected to specific types of restraint. Female gender predicted type of restraint and duration of episodes.

• Aas, Monica; Haukvik, Unn Kristin H.; Djurovic, Srdjan; Bergmann, Ørjan; Athanasiu, Lavinia & Tesli, Martin Steen [Show all 13 contributors for this article] (2013). BDNF val66met modulates the association between childhood trauma, cognitive and brain abnormalities in psychoses. Progress in Neuro-psychopharmacology and Biological Psychiatry. ISSN 0278-5846. 46, p. 181–188. doi: 10.1016/j.pnpbp.2013.07.008.
• Bakali, Jan Vegard; Wilberg, Theresa; Klungsøyr, Ole & Lorentzen, Steinar (2013). Development of Group Climate in Short- and Long-Term Psychodynamic Group Psychotherapy. International journal of group psychotherapy. ISSN 0020-7284. 63(3), p. 366–393. doi: 10.1521/ijgp.2013.63.3.366.
• Larsson, Sara; Aas, Monica; Klungsøyr, Ole; Agartz, Ingrid; Mork, Erlend & Steen, Nils Eiel [Show all 12 contributors for this article] (2013). Patterns of childhood adverse events are associated with clinical characteristics of bipolar disorder. BMC Psychiatry. ISSN 1471-244X. 13. doi: 10.1186/1471-244X-13-97.
• Hope, Sigrun; Ueland, Thor; Steen, Nils Eiel; Dieset, Ingrid; Lorentzen, Steinar & Berg, Akiah Ottesen [Show all 9 contributors for this article] (2013). Interleukin 1 receptor antagonist and soluble tumor necrosis factor receptor 1 are associated with general severity and psychotic symptoms in schizophrenia and bipolar disorder. Schizophrenia Research. ISSN 0920-9964. 145(1-3), p. 36–42. doi: 10.1016/j.schres.2012.12.023.
• Larsson, Sara; Andreassen, Ole Andreas; Aas, Monica; Røssberg, Jan Ivar; Mork, Erlend & Steen, Nils Eiel [Show all 12 contributors for this article] (2013). High prevalence of childhood trauma in patients with schizophrenia spectrum and affective disorder. Comprehensive Psychiatry. ISSN 0010-440X. 54(2), p. 123–127. doi: 10.1016/j.comppsych.2012.06.009.
• Mork, Erlend; Mehlum, Lars; Barrett, Elisabeth Ann; Agartz, Ingrid; Harkavy-Friedman, Jill M. & Lorentzen, Steinar [Show all 9 contributors for this article] (2012). Self-Harm in Patients with Schizophrenia Spectrum Disorders. Archives of Suicide Research. ISSN 1381-1118. 16(2), p. 111–123. doi: 10.1080/13811118.2012.667328.
• Aas, Monica; Steen, Nils Eiel; Agartz, Ingrid; Aminoff, Sofie Ragnhild; Lorentzen, Steinar & Sundet, Kjetil Søren [Show all 8 contributors for this article] (2012). Is cognitive impairment following early life stress in severe mental disorders based on specific or general cognitive functioning? Psychiatry Research. ISSN 0165-1781. 198(3), p. 495–500. doi: 10.1016/j.psychres.2011.12.045.
• Lorentzen, Steinar; Bakali, Jan-Vegard; Hersoug, Anne Grete; Hagtvet, Knut Arne; Ruud, Torleif & Høglend, Per Andreas (2012). Psychodynamic group psychotherapy: Impact of group lenght and therapist professional characteristics on development of therapeutic alliance. Clinical Psychology and Psychotherapy. ISSN 1063-3995. 19(5), p. 420–433. doi: 10.1002/cpp.758.
• Aas, Monica; Djurovic, Srdjan; Athanasiu, Lavinia; Steen, Nils Eiel; Agartz, Ingrid & Lorentzen, Steinar [Show all 9 contributors for this article] (2012). Serotonin Transporter Gene Polymorphism, Childhood Trauma, and Cognition in Patients With Psychotic Disorders. Schizophrenia Bulletin. ISSN 0586-7614. 38(1), p. 15–22. doi: 10.1093/schbul/sbr113.
• Steen, Nils Eiel; Methlie, Paal; Lorentzen, Steinar; Hope, Sigrun; Barrett, Elisabeth Ann & Larsson, Sara [Show all 13 contributors for this article] (2011). Increased systemic cortisol metabolism in patients with schizophrenia and bipolar disorder: a mechanism for increased stress vulnerability? Journal of Clinical Psychiatry. ISSN 0160-6689. 72(11), p. 1515–1521. doi: 10.4088/JCP.10m06068yel.
• Høglend, Per Andreas; Dahl, Hanne Sofie; Hersoug, Anne Grete; Lorentzen, Steinar & Perry, J. Christopher (2011). Long-term effects of transference interpretation in dynamic psychotherapy of personality disorders. European psychiatry. ISSN 0924-9338. 26(7), p. 419–424. doi: 10.1016/j.eurpsy.2010.05.006.
• Steen, Nils Eiel; Lorentzen, Steinar; Barrett, Elisabeth Ann; Lagerberg, Trine Vik; Hope, Sigrun & Larsson, Sara [Show all 11 contributors for this article] (2011). Sex-specific cortisol levels in bipolar disorder and schizophrenia during mental challenge - Relationship to clinical characteristics and medication. Progress in Neuro-psychopharmacology and Biological Psychiatry. ISSN 0278-5846. 35(4), p. 1100–1107. doi: 10.1016/j.pnpbp.2011.03.008.
• Knutzen, Maria; Mjøsund, Nina Helen; Eidhammer, Gunnar; Lorentzen, Steinar; Ilner, Stein E. Opjordsmoen & Sandvik, Leiv [Show all 7 contributors for this article] (2011). Characteristics of Psychiatric Inpatients Who Experienced Restraint and Those Who Did Not: A Case-Control Study. Psychiatric Services. ISSN 1075-2730. 62(5), p. 492–497. doi: 10.1176/ps.62.5.pss6205_0492.
• Lorentzen, Steinar; Rønnestad, Michael Helge & Orlinsky, D. E. (2011). Sources of influence on the professional development of psychologists and psychiatrists in Norway and Germany. European Journal of Psychotherapy & Councelling. ISSN 1364-2537. 13(2), p. 141–152. doi: 10.1080/13642537.2011.570016.
• Lorentzen, Steinar; Høglend, Per Andreas; Martinsen, Egil Wilhelm & Ringdal, Esther (2011). Practice-Based Evidence: Patients Who Did Not Respond to Group Analysis. International journal of group psychotherapy. ISSN 0020-7284. 61(3), p. 367–395. doi: 10.1521/ijgp.2011.61.3.366.
• Barrett, Elisabeth Ann; Sundet, Kjetil Søren; Simonsen, Carmen Elisabeth; Agartz, Ingrid; Lorentzen, Steinar & Mehlum, Lars [Show all 9 contributors for this article] (2011). Neurocognitive functioning and suicidality in schizophrenia spectrum disorders. Comprehensive Psychiatry. ISSN 0010-440X. 52(2), p. 156–163. doi: 10.1016/j.comppsych.2010.06.001.
• Athanasiu, Lavinia; Mattingsdal, Morten; Melle, Ingrid; Inderhaug, Elin; Lien, Trude & Agartz, Ingrid [Show all 10 contributors for this article] (2011). Intron 12 in NTRK3 is associated with bipolar disorder. Psychiatry Research. ISSN 0165-1781. 185(3), p. 358–362. doi: 10.1016/j.psychres.2010.05.011.
• Horneland, Marthe; Børnes, Dagny Sande; Høbye, Kirsten; Knutsen, Helge & Lorentzen, Steinar (2011). Can the Clinician–Researcher Gap be Bridged? Experiences from a Randomized Clinical Trial in Analytic/Dynamic Group Psychotherapy. Group Analysis. ISSN 0533-3164. 45(1), p. 84–98. doi: 10.1177/0533316411424370.
• Lorentzen, Steinar (2011). Writing Manuals for Psychodynamic Group Treatments. Group Analysis. ISSN 0533-3164. 45(1), p. 28–45. doi: 10.1177/0533316411411862.
• Steen, Nils Eiel; Tesli, Martin Steen; Kähler, Anna Katarina; Methlie, Paal; Hope, Sigrun & Barrett, Elisabeth Ann [Show all 16 contributors for this article] (2010). SRD5A2 is associated with increased cortisol metabolism in schizophrenia spectrum disorders. Progress in Neuro-psychopharmacology and Biological Psychiatry. ISSN 0278-5846. 34(8), p. 1500–1506. doi: 10.1016/j.pnpbp.2010.08.013.
• Lorentzen, Steinar; Orlinsky, D. E. & Rønnestad, Michael Helge (2010). Norske psykiatere som psykoterapeuter. Bakgrunn, klinisk erfaring, utdannelse, egenterapi og tilfredshet med jobb og tilværelsen forøvrig. Matrix. ISSN 0109-646X. 4, p. 275–287.
• Lorentzen, Steinar; Ruud, Torleif & Gråwe, Rolf W. (2010). Group therapy in community mental health centres. A Norwegian survey. Nordic Psychology. ISSN 1901-2276. 62(3), p. 20–34. doi: 10.1027/1901-2276/a000014.
• Bakali, Jan-Vegard; Wilberg, Theresa; Hagtvet, Knut Arne & Lorentzen, Steinar (2010). Sources accounting for alliance and cohesion at three stages in group psychotherapy: Variance component analyses. Group Dynamics. ISSN 1089-2699. 14(4), p. 368–383. doi: 10.1037/a0019170.
• Djurovic, Srdjan; Gustafsson, Omar; Mattingsdal, Morten; Athanasiu, Lavinia; Bjella, Thomas & Tesli, Martin Steen [Show all 11 contributors for this article] (2010). A genome-wide association study of bipolar disorder in Norwegian individuals, followed by replication in Icelandic sample. Journal of Affective Disorders. ISSN 0165-0327. 126(1-2), p. 312–316. doi: 10.1016/j.jad.2010.04.007.
• Hope, Sigrun; Melle, Ingrid; Aukrust, Pål; Agartz, Ingrid; Lorentzen, Steinar & Djurovic, Srdjan [Show all 9 contributors for this article] (2010). Osteoprotegerin levels in patients with severe mental disorders. Journal of Psychiatry & Neuroscience. ISSN 1180-4882. 35(5), p. 304–310. doi: 10.1503/jpn.090088.
• Larsson, Sara; Lorentzen, Steinar; Mork, Erlend; Barrett, Elisabeth Ann; Steen, Nils Eiel & Lagerberg, Trine Vik [Show all 11 contributors for this article] (2010). Age at onset of bipolar disorder in a Norwegian catchment area sample. Journal of Affective Disorders. ISSN 0165-0327. 124(1-2), p. 174–177. doi: 10.1016/j.jad.2009.10.031.
• Lorentzen, Steinar (2010). The Island of the blest. Some Ideas on How Group Analysis Can Survive: Response to Lecture by Jane Campbell. Group Analysis. ISSN 0533-3164. 43(4), p. 450–464. doi: 10.1177/0533316410379334.
• Hope, Sigrun; Melle, Ingrid; Aukrust, Pål; Steen, Nils Eiel; Birkenæs, Astrid Brate & Lorentzen, Steinar [Show all 9 contributors for this article] (2009). Similar immune profile in bipolar disorder and schizophrenia: selective increase in soluble tumor necrosis factor receptor I and von Willebrand factor. Bipolar Disorders. ISSN 1398-5647. 11(7), p. 726–734.
• Bakali, Jan Vegard; Baldwin, S A & Lorentzen, Steinar (2009). Modeling group process constructs at three stages in group psychotherapy. Psychotherapy Research. ISSN 1050-3307. 19(3), p. 332–343. doi: 10.1080/10503300902894430.
• Lorentzen, Steinar (2009). Miljøterapi av borderlinepasienter. Fokus på motoverføringsreaksjoner i staben. Matrix. ISSN 0109-646X. 26(1), p. 158–176.
• Lorentzen, Steinar (2008). La ricerca in psicoterapia di gruppo in Norvegia, L' efficacia clinica delle psicoterapie di gruppo. Raffaello Cortina Editore. ISSN 8860301823. p. 93–111.
• Lorentzen, Steinar (2008). Cohesion, Alliance, and outcome in group psychotherapy: comments on Joyce et al. (2007) and Johnson (2007). International journal of group psychotherapy. ISSN 0020-7284. 58(3), p. 403–409.
• Viken, Kari; Lonning, Vera; Røstad, Anne Lise; Korsmo, Marianne & Lorentzen, Steinar (2008). En undersøkelse av pasientenes og personalets opplevelse av postmiljø, arbeidsmiljø og trivsel ved alderspsykiatriske avdelinger. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 128(3), p. 310–312.
• Lorentzen, Steinar; Maar, Vivi & Sørlie, Tore (2006). A training program in group analysis in the Baltic states. Six years of experience. Group Analysis. ISSN 0533-3164. 39, p. 494–516.
• Lorentzen, Steinar; Maar, Vivi & Sørlie, Tore (2006). A training program in group analysis in the Baltic states: Six years experience. Group Analysis. ISSN 0533-3164. 39(4), p. 494–516.
• Lorentzen, Steinar (2006). Contemporary challenges for research in group analysis. Group Analysis. ISSN 0533-3164. 39(3), p. 321–340.
• Lorentzen, Steinar & Høglend, Per Andreas (2005). Predictors of change after long-term analytic group psychotherapy. Journal of Clinical Psychology. ISSN 0021-9762. 61(12), p. 1541–1553.
• Lorentzen, Steinar (2004). Predictors of change during long-term analytic group psychotherapy. Psychotherapy and Psychosomatics. ISSN 0033-3190. 73, p. 25–35. doi: 10.1159/000074437. Show summary

  Background: All studies on patient variables as predictors of outcome are on short-term groups. Therefore, we wanted to study predictors of outcome in an observational study of 69 out-patients treated in long-term, analytic group therapy (mean=32.5 months). Methods: Based on results from research on short-term groups, we selected six predictor variables representing central domains (demographics, diagnosis, initial severity of disturbance, chronicity, expectancy, and treatment duration) and explored their relationship to five outcome variables (GAF, GSI, IIP-C, Global improvement, and Chief complaints) by multiple regression analyses. Results: Treatment duration up to 2.5 years was a strong positive predictor. Contrary to findings from many short-term studies, presence of personality disorder, chronicity, and high initial severity of symptoms were not associated with less favourable outcome. Furthermore, marital status was not a positive predictor, and expectancy of a better outcome was only positively related to one of the outcome variables. Highly tentative results from exploratory stepwise regression analyses indicated that interpersonal problems on the cold dimension may be a negative predictor also in long-term therapy.

• Lorentzen, Steinar (2004). Comparing large group processes within groupanalytic training programs in Norway and the Baltics. Group. ISSN 0362-4021. 28(3), p. 211–226.
• Lorentzen, Steinar & Høglend, Per Andreas (2004). Predictors of change during long-term analytic group therapy. Psychotherapy and Psychosomatics. ISSN 0033-3190. 73, p. 25–35.
• Lorentzen, Steinar; Sexton, Harold & Høglend, Per Andreas (2004). Therapeutic alliance, cohesion and outcome in a long-term analytic group. A preliminary study. Nordic Journal of Psychiatry. ISSN 0803-9488. 58, p. 33–40.
• Lorentzen, Steinar (2003). Sammenligning av storgruppeprosesser innenfor utdanningsprogram i gruppeanalyse i Norge og Baltikum. Matrix. ISSN 0109-646X. 20(2).
• Lorentzen, Steinar; Maar, Vivi & Sørlie, Tore (2002). Commentary on `Group-Analytic Training Conducted through a Language Interpreter: Are We Understanding Each Other?' and `Group-Analytic Training Conducted through a Language Interpreter: Is the Experience Therapeutic? is it Group-Analytic?' by David Kennard et al. Group Analysis. ISSN 0533-3164. 35(2), p. 251–258. doi: 10.1177/0533316402352004.
• Lorentzen, Steinar (2000). Assessment of change after long-term psychoanalytic group treatment. Presentation of a field study of outpatients from a private psychiatric practice. Group Analysis. ISSN 0533-3164. 33, p. 373–396.
• Ringdal, Esther & Lorentzen, Steinar (2000). Konflikt og forsoning i gruppepsykoterapi. Tidsskrift for sjelesorg. ISSN 0333-3388. 20(3), p. 49–59.
• Maar, Vivi; Sørlie, Tore & Lorentzen, Steinar (2000). Supervision in group psychotherapy in a transcultural block-training programme: Internal and external barriers affecting the learning process. Ricerche sui Gruppi. 10, p. 75–81.
• Sørlie, Tore; Maar, Vivi & Lorentzen, Steinar (2000). Coping with language problems in a group analytic block-training programme in the Baltic states. Ricerche sui Gruppi. 10, p. 75–81.
• Lorentzen, Steinar (1999). Er langtids analytisk terapi en "truet rase? Noen refleksjoner om psykoterapiforskning og metode. Matrix. ISSN 0109-646X. 31, p. 71–86.
• Lorentzen, Steinar (1998). Block-training in group psychotherapy in The Baltic States. Group Analysis. ISSN 0533-3164. 31, p. 351–361.
• Lorentzen, Steinar (1998). Forholdet individ-gruppe belyst ved klinisk materiale og gruppeanalytiske forståelsesmodeller. Matrix. ISSN 0109-646X. 14, p. 320–334.
• Lorentzen, Steinar (1997). Den psykoanalytiske drøm. Teoretiske synspunkter. Matrix. ISSN 0109-646X. 13, p. 264–281.
• Lorentzen, Steinar; Herlofsen, Pål; Karterud, Sigmund & Ruud, Torleif (1995). Block Training in Group Analysis: The Norwegian Program. International journal of group psychotherapy. ISSN 0020-7284. 45(1), p. 73–89.
• Lorentzen, Steinar (1995). Experiences from the supervision of psychiatric interns in their psychotherapeutic work. The supervisees' satisfaction with their supervision. Nordic Journal of Psychiatry. ISSN 0803-9488. 49, p. 55–59. doi: 10.3109/08039489509100226.

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• Lorentzen, Steinar (2020). Fokusert gruppeanalytisk psykoterapi en integrasjon av klinisk erfaring og forskning. Gyldendal Akademisk. ISBN 978-82-05-50379-3. 264 p.
• Lorentzen, Steinar (2013). Group Analytic Psychotherapy. Working With affective, anxiety and personality disorders. Routledge. ISBN 9780415831482. 96 p.

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• Lorentzen, Steinar (2018). Forskning på psykoanalytisk praksis. Kateksis. p. 18–26.
• Homqvist, Rolf; Nissen-Lie, Helene A; Jørgensen, Carsten René; Broberg, Anders; Gustavsson, Per & Hau, Stephan [Show all 17 contributors for this article] (2017). Enfäldiga riktlinjer för behandling av depression. Dagens nyheter. ISSN 1101-2447.
• Lorentzen, Steinar; Fjeldstad, Anette; Ruud, Torleif & Høglend, Per Andreas (2015). Comparing short- and long-term group therapy: seven-year follow-up of a randomized clinical trial. Psychotherapy and Psychosomatics. ISSN 0033-3190. 84(5), p. 320–321. doi: 10.1159/000381751.
• Lorentzen, Steinar (2014). Tilfeldig om gruppeterapi. Tidsskrift for Norsk Psykologforening. ISSN 0332-6470. 51(12), p. 1046–1047.
• Knutzen, Maria; Bjørkly, Stål; Eidhammer, Gunnar; Lorentzen, Steinar; Mjøsund, Nina Helen & Opjordsmoen, Stein [Show all 8 contributors for this article] (2014). Corrigendum to "Characteristics of patients frequently subjected to pharmacological and mechanical restraint - A register study in three Norwegian acute psychiatric wards" [Psychiatry Res. 215 (2014) 127-133]. Psychiatry Research. ISSN 0165-1781. 219(3). doi: 10.1016/j.psychres.2014.03.013.
• Aas, Monica; Haukvik, Unn Kristin H.; Djurovic, Srdjan; Bergmann, Ørjan; Lorentzen, Steinar & Andreassen, Ole Andreas [Show all 8 contributors for this article] (2013). Is Met Variant of the BDNF VAL66MET-Combined with Childhood Trauma - A Risk Factor of Brain Abnormalities in Psychoses? Biological Psychiatry. ISSN 0006-3223. 73(9), p. 287S–287S.
• Aas, Monica; Djurovic, Srdjan; Athanasiu, Lavinia; Tesli, Martin Steen; Hellvin, Tone & Steen, Nils Eiel [Show all 11 contributors for this article] (2012). Interaction between (BDNF) VAL66Met, childhood adverse events and impaired cognition in patients with schizophrenia spectrum and bipolar disorder. Early Intervention in Psychiatry. ISSN 1751-7885. 6, p. 45–45.
• Varvin, Sverre; Billinghurst, Alexandra; Enckell, Henrik; Høudahl, Kari; Werbart, Andrzej & Lorentzen, Steinar [Show all 8 contributors for this article] (2012). Presentation av resultat av det nordiske DPPT samarbeid.
• Lorentzen, Steinar; Stänicke, Erik; Strømme, Hanne; Vanberg, Morten & Haraldsen, Ira Hebold (2012). Upresis forskningsgjengivelse av psykodynamisk terapi. Tidsskrift for Norsk Psykologforening. ISSN 0332-6470. 49(3).
• Lorentzen, Steinar; Stänicke, Erik; Strømme, Hanne; Vanberg, Morten & Haraldsen, Ira Hebold (2012). Psykoterapiforskning, psykodynamisk terapi og maktkamp. Tidsskrift for Norsk Psykologforening. ISSN 0332-6470. 49(5).
• Lorentzen, Steinar; Stänicke, Erik; Strømme, Hanne; Vanberg, Morten & Haraldsen, Ira Hebold (2012). Tanker på villspor. Morgenbladet. ISSN 0805-3847.
• Aas, Monica; Djurovic, Srdjan; Athanasiu, Lavinia; Steen, Nils Eiel; Agartz, Ingrid & Lorentzen, Steinar [Show all 9 contributors for this article] (2011). SEROTONIN TRANSPORTER GENE POLYMORPHISMS, CHILDHOOD TRAUMA AND COGNITION IN PATIENTS WITH PSYCHOTIC DISORDERS. Schizophrenia Bulletin. ISSN 0586-7614. 37, p. 80–80.
• Hope, Sigrun; Melle, Ingrid; Ueland, Thor; Lorentzen, Steinar; Steen, Nils Eiel & Berg, Akiah Ottesen [Show all 10 contributors for this article] (2011). INTERLEUKIN 1 RECEPTOR ANTAGONIST AND TUMOR NECROSIS FACTOR RECEPTOR 1 ARE ASSOCIATED WITH GENERAL SEVERITY AND PSYCHOTIC SYMPTOMS IN SCHIZOPHRENIA AND BIPOLAR DISORDER. Schizophrenia Bulletin. ISSN 0586-7614. 37, p. 115–116.
• Lorentzen, Steinar (2010). Some ideas of how group analysis can survive: Responce to lecture by Jane Campbell. Group Analysis. ISSN 0533-3164. 43(4), p. 450–464.
• Hope, Sigrun; Melle, Ingrid; Aukrust, Pål; Steen, Nils Eiel; Birkenæs, Astrid Brate & Lorentzen, Steinar [Show all 9 contributors for this article] (2009). SIMILAR INFLAMMATORY PROFILE IN BIPOLAR DISORDER AND SCHIZOPHRENIA: SELECTIVE INCREASE IN SOLUBLE TUMOR NECROSIS FACTOR RECEPTOR I AND VON WILLEBRAND FACTOR. Schizophrenia Bulletin. ISSN 0586-7614. 35, p. 235–235.
• Barrett, Elizabeth Ann; Sundet, Kjetil Søren; Simonsen, Carmen Elisabeth; Agartz, Ingrid; Lorentzen, Steinar & Mehlum, Lars [Show all 9 contributors for this article] (2009). SUICIDE ATTEMPTS AND NEUROCOGNITIVE FUNCTIONING IN SCHIZOPHRENIA SPECTRUM DISORDERS. Schizophrenia Bulletin. ISSN 0586-7614. 35, p. 279–279.
• Lorentzen, Steinar; Høglend, Per Andreas & Ruud, Torleif (2009). The efficacy of short- and long-term psychodynamic group psychotherapy.
• Lorentzen, Steinar; Bakali, Jan Vegard; Høglend, Per Andreas & Ruud, Torleif (2009). Pretreatment patient characteristics as predictors of alliance in psychodynamic group psychotherapy.
• Steen, Nils Eiel; Lorentzen, Steinar; Melle, Ingrid; Agartz, Ingrid; Berg, Jens Petter & Andreassen, Ole Andreas (2008). Variation in cortisol levels and relationship to stress in bipolar disorder. Biological Psychiatry. ISSN 0006-3223. 63, p. 142S–142S.
• Lorentzen, Steinar & Hoglend, PA (2008). Moderators of the effects of treatment length in long-term psychodynamic group psychotherapy. Psychotherapy and Psychosomatics. ISSN 0033-3190. 77, p. 321–322. doi: 10.1159/000147946.
• Lorentzen, Steinar (2008). Cohesion, alliance, and outcome in group psychotherapy: Comments on Joyce et al. (2007) and Johnson (2007). International journal of group psychotherapy. ISSN 0020-7284. 58, p. 403–409.
• Lorentzen, Steinar & Rønnestad, Michael Helge (2008). Sources of influence for professional development and psychologists in Norway and Germany.
• Christiansen, Øystein M; Horn, Kjetil; Hytten, Karsten; Knutsen, Andreas J; Lorentzen, Steinar & Martinsen, Egil Wilhelm [Show all 11 contributors for this article] (2016). Psykoterapiveiledningen i psykiaterutdanningen - innstilling fra arbeidsutvalg nedsatt av styret i Npf. Dnlf.

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