Aleksander Hagen Erga | University of Stavanger

Contact

Department

Faculty of Social Sciences

Department of Social Studies

About me

I am an associate professor in psychology and senior clinical psychologist in addiction psychology. My research interest include mental health and cognition in brain disorders, such as Parkinson’s disease and addiction.

I currently work as the head of research at the Center for Alcohol and Drug Research (KORFOR) and researcher at the Centre for Movement Disorders, both located at Stavanger University Hospital. I am also a supervisor in Cognitive Behavioral Therapy.

Publications

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Vitenskapelige publikasjoner
- Moe, Fredrik Dreyer; Erga, Aleksander Hagen; Bjørnestad, Jone Ravndal; Dettweiler, Ulrich
  
  (2024)
  The interdependence of substance use, satisfaction with life, and psychological distress: a dynamic structural equation model analysis.
  Frontiers in Psychiatry.
  
  ISSN 1664-0640.
  
  Volum 15.
  
  DOI: 10.3389/fpsyt.2024.1288551
- Hetland, Jens; Lundervold, Astri J. ; Erga, Aleksander Hagen
  
  (2024)
  Cognitive impairment as a predictor of long-term psychological distress in patients with polysubstance use disorders: a prospective longitudinal cohort study.
  BMC Psychiatry.
  
  ISSN 1471-244X.
  
  Volum 24.
  
  Hefte 1.
  
  DOI: 10.1186/s12888-024-05600-x
- Erga, Aleksander Hagen; Ushakova, Anastasia; Elstad, Maria; Grude Fodstad, Elise Constance; Belfrage, Anna
  
  (2024)
  The Relationship Between Self-Reported Childhood Maltreatment and Mental Health in Substance Use Disorders: A 6-Year Retrospective Analysis.
  Journal of Dual Diagnosis (JDD).
  
  ISSN 1550-4263.
  
  DOI: 10.1080/15504263.2024.2338799
- Erga, Aleksander Hagen; Alves, Guido Werner; Leentjens, Albert F.G.
  
  (2023)
  The ePark study protocol: A decentralized trial of individual video-assisted cognitive behavioural therapy for depressive disorder in Parkinson's disease.
  Contemporary Clinical Trials Communications.
  
  ISSN 2451-8654.
  
  Volum 32.
  
  DOI: 10.1016/j.conctc.2023.101080
- Hetland, Jens; Hagen, Egon; Lundervold, Astri J. ; Erga, Aleksander Hagen
  
  (2023)
  Performance on Cognitive Screening Tests and Long-Term Substance Use Outcomes in Patients with Polysubstance Use Disorder.
  European Addiction Research.
  
  ISSN 1022-6877.
  
  DOI: 10.1159/000528921
- Erga, Aleksander Hagen; Maple-Grødem, Jodi; Alves, Guido Werner
  
  (2022)
  Cannabis use in Parkinson’s disease—A nationwide online survey study.
  Acta Neurologica Scandinavica.
  
  ISSN 0001-6314.
  
  Volum 145.
  
  Hefte 6.
  
  s.692-697.
  
  DOI: 10.1111/ane.13602
- Erga, Aleksander Hagen; Nesvåg, Sverre Martin; Dahlberg, Ingrid Elin; McKay, James R.
  
  (2022)
  Persistent sleep problems among people in recovery from substance use disorders: a mixed methods study.
  Addiction Research and Theory.
  
  ISSN 1606-6359.
  
  s.1-9.
  
  DOI: 10.1080/16066359.2022.2074406
- Grude Fodstad, Elise Constance; Ushakova, Anastasia; Pallesen, Ståle; Hagen, Egon; Erga, Aleksander Hagen; Erevik, Eilin K.
  
  (2022)
  Personality and substance use disorder: Characteristics as measured by NEO-personality inventory–revised.
  Frontiers in Psychology.
  
  ISSN 1664-1078.
  
  Volum 13.
  
  DOI: 10.3389/fpsyg.2022.982763
- Belfrage, Anna; Njå, Anne-Lill Mjølhus; Grude Fodstad, Elise Constance; Lunde, Siri; Årstad, Janne; Lid, Torgeir Gilje; Erga, Aleksander Hagen
  
  (2022)
  Traumatic experiences and PTSD symptoms in substance use disorder: A comparison of recovered versus current users.
  Nordic Studies on Alcohol and Drugs (NAD).
  
  ISSN 1455-0725.
  
  Volum 40.
  
  Hefte 1.
  
  s.61-75.
  
  DOI: 10.1177/14550725221122222
- Svendsen, Thomas Solgaard; Veseth, Marius; McKay, James R.; Bjørnestad, Jone Ravndal; Erga, Aleksander Hagen; Moltu, Christian; Nesvåg, Sverre
  
  (2021)
  Securing Participant Engagement in Longitudinal Substance Use Disorder Recovery Research: A Qualitative Exploration of Key Retention Factors.
  Journal of Psychosocial Rehabilitation and Mental Health.
  
  ISSN 2198-9834.
  
  Volum 8.
  
  s.247-259.
  
  DOI: 10.1007/s40737-021-00222-y
- Hetland, Jens; Braatveit, Kirsten; Hagen, Egon; Lundervold, Astri J. ; Erga, Aleksander H.
  
  (2021)
  Prevalence and Characteristics of Borderline Intellectual Functioning in a Cohort of Patients With Polysubstance Use Disorder.
  Frontiers in Psychiatry.
  
  ISSN 1664-0640.
  
  Volum 12.
  
  s.1-9.
  
  DOI: 10.3389/fpsyt.2021.651028
- Erga, Aleksander Hagen; Hønsi, Audhild; Anda-Ågotnes, Liss Gøril; Nesvåg, Sverre Martin; Hesse, Morten; Hagen, Egon
  
  (2020)
  Trajectories of psychological distress during recovery from polysubstance use disorder.
  Addiction Research and Theory.
  
  ISSN 1606-6359.
  
  s.1-8.
  
  DOI: 10.1080/16066359.2020.1730822
- Erga, Aleksander Hagen; Alves, Guido Werner; Tysnes, Ole-Bjørn; Pedersen, Kenn Freddy
  
  (2020)
  Impulsive and compulsive behaviors in Parkinson's disease: Impact on quality of and satisfaction with life, and caregiver burden.
  Parkinsonism & Related Disorders.
  
  ISSN 1353-8020.
  
  Volum 78.
  
  s.27-30.
  
  DOI: 10.1016/j.parkreldis.2020.07.007
- Hagen, Egon; Sømhovd, Mikael Julius; Hesse, Morten; Arnevik, Espen Kristian; Erga, Aleksander Hagen
  
  (2019)
  Measuring cognitive impairment in young adults with polysubstance use disorder with MoCA or BRIEF-A – The significance of psychiatric symptoms.
  Journal of Substance Abuse Treatment.
  
  ISSN 0740-5472.
  
  Volum 97.
  
  s.21-27.
  
  DOI: 10.1016/j.jsat.2018.11.010
- Bjørnestad, Jone Ravndal; Svendsen, Thomas Solgård; Slyngstad, Tale Ekeroth; Erga, Aleksander Hagen; McKay, James R.; Nesvåg, Sverre Martin; Skålevik, Alexander Wågan; Veseth, Marius; Moltu, Christian
  
  (2019)
  “A life more ordinary” Processes of 5-year recovery from substance abuse. Experiences of 30 recovered service users.
  Frontiers in Psychiatry.
  
  ISSN 1664-0640.
  
  Volum 10.
  
  s.1-9.
  
  DOI: 10.3389/fpsyt.2019.00689
- Erga, Aleksander Hagen; Alves, Guido Werner; Tysnes, Ole-Bjørn; Pedersen, Kenn Freddy
  
  (2019)
  Evolution of impulsive–compulsive behaviors and cognition in Parkinson’s disease.
  Journal of Neurology.
  
  ISSN 0340-5354.
  
  Volum 267.
  
  Hefte 1.
  
  s.259-266.
  
  DOI: 10.1007/s00415-019-09584-7
- Molde, Helge; Moussavi, Yasaman; Kopperud, Stine Therese; Erga, Aleksander Hagen; Hansen, Anita Lill; Pallesen, Ståle
  
  (2018)
  Impulse-control disorders in Parkinson's Disease: A meta-analysis and review of case-control studies.
  Frontiers in Neurology.
  
  ISSN 1664-2295.
  
  Volum 9:330.
  
  s.1-15.
  
  DOI: 10.3389/fneur.2018.00330
- Erga, Aleksander Hagen; Dalen, Ingvild; Ushakova, Anastasia; Chung, Janete; Tzoulis, Charalampos; Tysnes, Ole-Bjørn; Alves, Guido; Pedersen, Kenn Freddy; Maple-Grødem, Jodi
  
  (2018)
  Dopaminergic and opioid pathways associated with impulse control disorders in Parkinson's disease.
  Frontiers in Neurology.
  
  ISSN 1664-2295.
  
  Volum 9:109.
  
  s.1-9.
  
  DOI: 10.3389/fneur.2018.00109
- Erga, Aleksander Hagen; Gjerstad, Michaela D; Alves, Guido Werner; Pedersen, Kenn Freddy
  
  (2018)
  
  Psykologisk behandling av ikke-motoriske symptomer ved parkinsons sykdom.
  
  Tidsskrift for Norsk Psykologforening.
  
  ISSN 0332-6470.
  
  Volum 55.
  
  Hefte 12.
  
  s.1108-1116.
- Erga, Aleksander Hagen; Alves, Guido; Larsen, Jan Petter; Tysnes, Ole-Bjørn; Pedersen, Kenn Freddy
  
  (2017)
  Impulsive and Compulsive Behaviors in Parkinson’s Disease: The Norwegian ParkWest Study.
  Journal of Parkinson's Disease.
  
  ISSN 1877-7171.
  
  Volum 7.
  
  Hefte 1.
  
  s.183-191.
  
  DOI: 10.3233/JPD-160977
- Hagen, Egon; Erga, Aleksander Hagen; Hagen, Katrin Pedersen; Nesvåg, Sverre; McKay, James R.; Lundervold, Astri; Walderhaug, Espen
  
  (2017)
  One-year sobriety improves satisfaction with life, executive functions and psychological distress among patients with polysubstance use disorder.
  Journal of Substance Abuse Treatment.
  
  ISSN 0740-5472.
  
  Volum 76.
  
  s.81-87.
  
  DOI: 10.1016/j.jsat.2017.01.016
- Hagen, Egon; Erga, Aleksander Hagen; Nesvåg, Sverre; McKay, James R.; Lundervold, Astri; Walderhaug, Espen
  
  (2017)
  One-year abstinence improves ADHD symptoms among patients with polysubstance use disorder.
  Addictive Behaviors Reports.
  
  ISSN 2352-8532.
  
  Volum 6.
  
  s.96-101.
  
  DOI: 10.1016/j.abrep.2017.08.005
- Svendsen, Thomas Solgård; Erga, Aleksander Hagen; Hagen, Egon; McKay, James R.; Njå, Anne-Lill Mjølhus; Årstad, Janne; Nesvåg, Sverre
  
  (2017)
  How to Maintain High Retention Rates in Long-Term Research on Addiction: A Case Report.
  Journal of Social Work Practice in The Addictions.
  
  ISSN 1533-256X.
  
  Volum 17.
  
  Hefte 4.
  
  s.374-387.
  
  DOI: 10.1080/1533256X.2017.1361831
- Erga, Aleksander Hagen; Kvernenes, Katrine Valvatne; Evensen, Kjersti Berge; Vika, Margrethe Elin
  
  (2017)
  
  Behandling av odontofobi for pasienter med post-traumatiske plager : en litteraturoversikt.
  
  Den norske tannlegeforenings tidende.
  
  ISSN 0029-2303.
  
  Volum 127.
  
  Hefte 8.
  
  s.682-686.
- Hagen, Egon; Erga, Aleksander Hagen; Hagen, Katrin Pedersen; Nesvåg, Sverre; McKay, James R.; Lundervold, Astri; Walderhaug, Espen
  
  (2016)
  Assessment of executive function in patients with substance use disorder: A comparison of inventory- and performance-based assessment.
  Journal of Substance Abuse Treatment.
  
  ISSN 0740-5472.
  
  Volum 66.
  
  s.1-8.
  
  DOI: 10.1016/j.jsat.2016.02.010
Bøker og kapitler
Formidling
- Bjåstad, Jon Fauskanger; Aas, Sigve Nyvik; Distefano, Marita Borg; Berglen, Gunnhild; Haugen, Nikolai Raaby; Gjestsen, Martha Therese; Erga, Aleksander Hagen; Pettersen, Ingvild; Nordvoll, Laila Yvonne; Sundstrøm, Mariann; Grimsgaard, Anne Sameline
  
  (2024)
  Brukermedvirkning i forskning – for lite, for sent.
  Tidsskrift for Den norske legeforening.
  
  ISSN 0029-2001.
  
  DOI: 10.4045/tidsskr.23.0684
- Hetland, Jens; Lundervold, Astri J. ; Erga, Aleksander Hagen
  
  (2024)
  Correction to: Cognitive impairment as a predictor of long-term psychological distress in patients with polysubstance use disorders: a prospective longitudinal cohort study (BMC Psychiatry, (2024), 24, 1, (143), 10.1186/s12888-024-05600-x).
  BMC Psychiatry.
  
  ISSN 1471-244X.
  
  Volum 24.
  
  Hefte 1.
  
  DOI: 10.1186/s12888-024-05774-4
- Erga, Aleksander Hagen; Alves, Guido Werner; Leentjens, Albert F.G.
  
  (2023)
  Corrigendum to “The ePark study protocol: A decentralized trial of individual video-assisted cognitive behavioural therapy for depressive disorder in Parkinson's disease” [Contemp. Clinic. Trials Commun. 32 (2023) 101080](S2451865423000261)(10.1016/j.conctc.2023.101080).
  Contemporary Clinical Trials Communications.
  
  ISSN 2451-8654.
  
  DOI: 10.1016/j.conctc.2023.101205
- Oftedal, Linn Silje Wathne; Lange, Johannes; Pedersen, Kenn Freddy; Erga, Aleksander Hagen; Dalen, Ingvild; Tysnes, Ole-Bjørn; Alves, Guido Werner; Maple-Grødem, Jodi
  
  (2023)
  Early GCase activity is a predictor of long-term cognitive decline in Parkinson’s disease.
  Translational Neurodegeneration.
  
  ISSN 2096-6466.
  
  Volum 12.
  
  Hefte 1.
  
  DOI: 10.1186/s40035-023-00373-x
- Erga, Aleksander Hagen; Hetland, Jens; Braatveit, Kirsten Johanne
  
  (2023)
  Patients with cognitive deficits and substance use disorders, a clinical population in need of focused attention.
  Frontiers in Psychiatry.
  
  ISSN 1664-0640.
  
  Volum 14.
  
  DOI: 10.3389/fpsyt.2023.1281914
- Erga, Aleksander Hagen; Bjørnestad, Anders; Tysnes, Ole-Bjørn; Alves, Guido; Pedersen, Kenn Freddy
  
  (2018)
  Is psychosis associated with impulse control disorders in Parkinson's disease?.
  Parkinsonism & Related Disorders.
  
  ISSN 1353-8020.
  
  Volum 53.
  
  s.110-111.
  
  DOI: 10.1016/j.parkreldis.2018.04.026
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