Espen Walderhaug

  • Researcher; PhD
  • +47 22 92 38 98

Clinical psychologist

Research interests:

  • Substance Use Disorder treatment and recovery
  • Polydrug use, Mental disorders, Trauma
  • Neuropsychology, Serotonin (5-HT)


Principal Investigator for Youth Addiction Treatment Evaluation Project (YATEP)



Publications 2021

Walderhaug E (2021)
From punishment to help?
Tidsskr Nor Laegeforen, 141 (9)
DOI 10.4045/tidsskr.21.0386, PubMed 34107660

Publications 2020

Gatti F, Walderhaug E, Kern-Godal A, Lysell J, Arnevik EA (2020)
Complementary horse-assisted therapy for substance use disorders: a randomized controlled trial
Addict Sci Clin Pract, 15 (1), 7
DOI 10.1186/s13722-020-0183-z, PubMed 32019584

Paap MCS, Hummelen B, Braeken J, Arnevik EA, Walderhaug E, Wilberg T, Berghuis H, Hutsebaut J, Pedersen G (2020)
A multi-center psychometric evaluation of the Severity Indices of Personality Problems 118 (SIPP-118): Do we really need all those facets?
Qual Life Res, 30 (2), 567-575
DOI 10.1007/s11136-020-02654-8, PubMed 33029679

Rand K, Arnevik EA, Walderhaug E (2020)
Quality of life among patients seeking treatment for substance use disorder, as measured with the EQ-5D-3L
J Patient Rep Outcomes, 4 (1), 92
DOI 10.1186/s41687-020-00247-0, PubMed 33165764

Publications 2019

Arnevik EA, Pedersen G, Walderhaug E, Lien I, Wilberg T, Hummelen B (2019)
Measuring Personality Problems in Patients With Substance Use Disorders: A Cross-Sample Validation
J Dual Diagn, 15 (4), 324-332
DOI 10.1080/15504263.2019.1668583, PubMed 31571533

Pedersen G, Arnevik EA, Hummelen B, Walderhaug E, Wilberg T (2019)
Psychometric Properties of the Severity Indices of Personality Problems (SIPP) in Two Samples A Norwegian Community Sample and Clinical Samples of Patients With and Without Personality Disorders
Eur. J. Psychol. Assess., 35 (5), 698-711
DOI 10.1027/1015-5759/a000436

Walderhaug E, Seim-Wikse KJ, Enger A, Milin O (2019)
Polydrug use - prevalence and registration
Tidsskr Nor Laegeforen, 139 (13)
DOI 10.4045/tidsskr.19.0251, PubMed 31556532

Walderhaug E, Seim-Wikse KJ, Enger A, Milin O (2019)
Polydrug Use - prevalence and registration
Tidsskr. Nor. Laegeforen., 139 (13), 1279-1281

Publications 2018

Andersson HW, Steinsbekk A, Walderhaug E, Otterholt E, Nordfjærn T (2018)
Predictors of Dropout From Inpatient Substance Use Treatment: A Prospective Cohort Study
Subst Abuse, 12, 1178221818760551
DOI 10.1177/1178221818760551, PubMed 29531472

Publications 2017

Hagen E, Erga AH, Hagen KP, Nesvåg SM, McKay JR, Lundervold AJ, Walderhaug E (2017)
One-year sobriety improves satisfaction with life, executive functions and psychological distress among patients with polysubstance use disorder
J Subst Abuse Treat, 76, 81-87
DOI 10.1016/j.jsat.2017.01.016, PubMed 28159440

Hagen E, Erga AH, Nesvåg SM, McKay JR, Lundervold AJ, Walderhaug E (2017)
One-year abstinence improves ADHD symptoms among patients with polysubstance use disorder
Addict Behav Rep, 6, 96-101
DOI 10.1016/j.abrep.2017.08.005, PubMed 29450242

Publications 2016

Hagen E, Erga AH, Hagen KP, Nesvåg SM, McKay JR, Lundervold AJ, Walderhaug E (2016)
Assessment of Executive Function in Patients With Substance Use Disorder: A Comparison of Inventory- and Performance-Based Assessment
J Subst Abuse Treat, 66, 1-8
DOI 10.1016/j.jsat.2016.02.010, PubMed 27211990

Nordheim K, Walderhaug E, Alstadius S, Kern-Godal A, Arnevik E, Duckert F (2016)
Young adults' reasons for dropout from residential substance use disorder treatment
Qual Soc Work, 17 (1), 24-40
DOI 10.1177/1473325016654559, PubMed 29276430

Publications 2015

Kern-Godal A, Arnevik EA, Walderhaug E, Ravndal E (2015)
Substance use disorder treatment retention and completion: a prospective study of horse-assisted therapy (HAT) for young adults
Addict Sci Clin Pract, 10, 21
DOI 10.1186/s13722-015-0043-4, PubMed 26466788

Publications 2012

Matuskey D, Pittman B, Planeta-Wilson B, Walderhaug E, Henry S, Gallezot JD, Nabulsi N, Ding YS, Bhagwagar Z, Malison R, Carson RE, Neumeister A (2012)
Age effects on serotonin receptor 1B as assessed by PET
J Nucl Med, 53 (9), 1411-4
DOI 10.2967/jnumed.112.103598, PubMed 22851636

Publications 2011

Aikins DE, Jackson ED, Christensen A, Walderhaug E, Afroz S, Neumeister A (2011)
Differential conditioned fear response predicts duloxetine treatment outcome in male veterans with PTSD: a pilot study
Psychiatry Res, 188 (3), 453-5
DOI 10.1016/j.psychres.2011.05.009, PubMed 21620486

Potenza MN, Walderhaug E, Henry S, Gallezot JD, Planeta-Wilson B, Ropchan J, Neumeister A (2011)
Serotonin 1B receptor imaging in pathological gambling
World J Biol Psychiatry, 14 (2), 139-45
DOI 10.3109/15622975.2011.598559, PubMed 21936763

Walderhaug E, Varga M, Pedro MS, Hu J, Neumeister A (2011)
The role of the aminergic systems in the pathophysiology of bipolar disorder
Curr Top Behav Neurosci, 5, 107-26
DOI 10.1007/7854_2010_72, PubMed 25236552

Publications 2010

Amin Z, Kanarek K, Krupitsky E, Walderhaug E, Ilomäki R, Blumberg H, Price LH, Bhagwagar Z, Carpenter LL, Tyrka AR, Magnusson A, Landrø NI, Zvartau E, Gelernter J, Epperson CN, Räsänen P, Siironen J, Lappalainen J (2010)
A sequencing-based survey of functional APAF1 alleles in a large sample of individuals with affective illness and population controls
Am J Med Genet B Neuropsychiatr Genet, 153B (1), 332-5
DOI 10.1002/ajmg.b.30984, PubMed 19455599

Walderhaug E, Herman AI, Magnusson A, Morgan MJ, Landrø NI (2010)
The short (S) allele of the serotonin transporter polymorphism and acute tryptophan depletion both increase impulsivity in men
Neurosci Lett, 473 (3), 208-11
DOI 10.1016/j.neulet.2010.02.048, PubMed 20188795

Publications 2009

Walderhaug E, Kasserman S, Aikins D, Vojvoda D, Nishimura C, Neumeister A (2009)
Effects of duloxetine in treatment-refractory men with posttraumatic stress disorder
Pharmacopsychiatry, 43 (2), 45-9
DOI 10.1055/s-0029-1237694, PubMed 20108200

Publications 2008

Walderhaug E, Landrø NI, Magnusson A (2008)
A synergic effect between lowered serotonin and novel situations on impulsivity measured by CPT
J Clin Exp Neuropsychol, 30 (2), 204-11
DOI 10.1080/13803390701346311, PubMed 18938672

Publications 2007

Walderhaug E, Magnusson A, Neumeister A, Lappalainen J, Lunde H, Refsum H, Landrø NI (2007)
Interactive effects of sex and 5-HTTLPR on mood and impulsivity during tryptophan depletion in healthy people
Biol Psychiatry, 62 (6), 593-9
DOI 10.1016/j.biopsych.2007.02.012, PubMed 17544379

Publications 2002

Walderhaug E, Lunde H, Nordvik JE, Landrø NI, Refsum H, Magnusson A (2002)
Lowering of serotonin by rapid tryptophan depletion increases impulsiveness in normal individuals
Psychopharmacology (Berl), 164 (4), 385-91
DOI 10.1007/s00213-002-1238-4, PubMed 12457268

Publications 1995

Prescott C, Walderhaug E (1995)
The last frontier? Processes of Indo-Europeanization in Northern Europe: The Norwegian case
J. Indo-Eur. Stud., 23 (3-4), 257-278

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