Aleksander Hagen Erga | University of Stavanger

Contact

Department

Faculty of Social Sciences

Department of Social Studies

About me

I am a Professor II at the Institute of Social Sciences, where I teach methods and clinical psychology. Additionally, I serve as the research leader at the Center for Drug and Alcohol Research (KORFOR) and as a researcher at the Center for Movement Disorders, both affiliated with Stavanger University Hospital.

I have a clinical background as a specialist psychologist in substance abuse and addiction psychology, complemented by further training in cognitive behavioral therapy. My research also focuses on clinical interventions derived from these models.

My research

My research primarily investigates clinical conditions, with a particular emphasis on cognition and mental health in relation to various brain disorders, such as Parkinson's disease and substance use disorders. I adopt a clinical focus, primarily utilizing quantitative methods for research, including cohort studies, longitudinal data analysis, and clincal trials. I also have project management experience overseeing studies with diverse designs.

I mainly supervise PhD students but am also open to mentoring master's students.

Follow me online

Google scholar profile Researchgate profile Personal webpage (norwegian)

Publications

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.

Volum 20.

Hefte 3.

s.210-222.

DOI: 10.1080/15504263.2024.2338799

Grude Fodstad, Elise Constance; Erga, Aleksander Hagen; Pallesen, Ståle; Ushakova, Anastasia; Erevik, Eilin K.

(2024)

Personality traits as predictors of recovery among patients with substance use disorder.

Journal of Substance Use and Addiction Treatment.

ISSN 2949-8759.

Volum 162.

DOI: 10.1016/j.josat.2024.209360

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

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