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Ivar Snorrason, Ph.D.

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Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
  1. Zhu JY, Plamondon A, Goldstein AL, Snorrason I, Katz J, Björgvinsson T. Dynamics of daily positive and negative affect and relations to anxiety and depression symptoms in a transdiagnostic clinical sample. Depress Anxiety. 2022 Nov 13. PMID: 36372960.
    Citations:    Fields:    
  2. Moritz S, Gallinat C, Weidinger S, Bruhns A, Lion D, Snorrason I, Keuthen N, Schmotz S, Penney D. The Generic BFRB Scale-8 (GBS-8): a transdiagnostic scale to measure the severity of body-focused repetitive behaviours. Behav Cogn Psychother. 2022 Nov; 50(6):620-628. PMID: 35924301.
    Citations:    Fields:    Translation:Humans
  3. Greenberg JL, Jacobson NC, Hoeppner SS, Bernstein EE, Snorrason I, Schwartzberg A, Steketee G, Phillips KA, Wilhelm S. Early response to cognitive behavioral therapy for body dysmorphic disorder as a predictor of outcomes. J Psychiatr Res. 2022 08; 152:7-13. PMID: 35700586; PMCID: PMC9447469.
    Citations:    Fields:    Translation:Humans
  4. Snorrason I, Lee HJ. Assessing Excoriation (Skin-Picking) Disorder: Clinical Recommendations and Preliminary Examination of a Comprehensive Interview. Int J Environ Res Public Health. 2022 05 31; 19(11). PMID: 35682303; PMCID: PMC9180539.
    Citations:    Fields:    Translation:Humans
  5. Wilhelm S, Weingarden H, Greenberg JL, Hoeppner SS, Snorrason I, Bernstein EE, McCoy TH, Harrison OT. Efficacy of App-Based Cognitive Behavioral Therapy for Body Dysmorphic Disorder with Coach Support: Initial Randomized Controlled Clinical Trial. Psychother Psychosom. 2022; 91(4):277-285. PMID: 35588706; PMCID: PMC9394457.
    Citations:    Fields:    Translation:Humans
  6. Bernstein EE, Weingarden H, Wolfe EC, Hall MD, Snorrason I, Wilhelm S. Human Support in App-Based Cognitive Behavioral Therapies for Emotional Disorders: Scoping Review. J Med Internet Res. 2022 04 08; 24(4):e33307. PMID: 35394434; PMCID: PMC9034419.
    Citations:    Fields:    Translation:Humans
  7. Hjartarson KH, Snorrason I, Bringmann LF, Ólafsson RP. Automaticity and depression: Daily mood-reactive rumination in people with and without depression history. J Psychopathol Clin Sci. 2022 May; 131(4):327-340. PMID: 35389688.
    Citations: 1     Translation:Humans
  8. Klosowska J, Prochwicz K, Sznajder D, Antosz-Rekucka R, Tuleja A, Dembinska A, Snorrason I. Validation and Psychometric Properties of the Polish Version of the Skin Picking Scale-Revised. Int J Environ Res Public Health. 2022 02 23; 19(5). PMID: 35270270; PMCID: PMC8909651.
    Citations: 1     Fields:    Translation:Humans
  9. Snorrason I, Beard C, Christensen K, Bjornsson AS, Björgvinsson T. Body Dysmorphic Disorder and Major Depressive Episode Have Comorbidity-Independent Associations With Suicidality in an Acute Psychiatric Setting. Focus (Am Psychiatr Publ). 2021 Oct; 19(4):490-495. PMID: 35747305; PMCID: PMC9063574.
    Citations:    
  10. Simpson HB, Foa EB, Wheaton MG, Gallagher T, Gershkovich M, Schmidt AB, Huppert JD, Campeas RB, Imms PA, Cahill SP, DiChiara C, Tsao SD, Puliafico AC, Chazin D, Asnaani A, Moore K, Tyler J, Steinman SA, Sanchez-LaCay A, Capaldi S, Snorrason I, Turk-Karan E, Vermes D, Kalanthroff E, Pinto A, Hahn CG, Xu B, Van Meter PE, Katechis M, Scodes J, Wang Y. Maximizing remission from cognitive-behavioral therapy in medicated adults with obsessive-compulsive disorder. Behav Res Ther. 2021 08; 143:103890. PMID: 34089924; PMCID: PMC8241471.
    Citations: 1     Fields:    Translation:Humans
  11. Snorrason I, Conway CC, Falkenstein MJ, Kelley KN, Kuckertz JM. Higher order compulsivity versus grooming dimensions as treatment targets for the DSM-5 obsessive-compulsive and related disorders. Depress Anxiety. 2022 01; 39(1):49-55. PMID: 33793029.
    Citations: 1     Fields:    Translation:HumansAnimals
  12. Weingarden H, Hoeppner SS, Snorrason I, Greenberg JL, Phillips KA, Wilhelm S. Rates of remission, sustained remission, and recurrence in a randomized controlled trial of cognitive behavioral therapy versus supportive psychotherapy for body dysmorphic disorder. Depress Anxiety. 2021 Mar 16. PMID: 33724643; PMCID: PMC8443701.
    Citations: 1     Fields:    
  13. Hjartarson KH, Snorrason I, Bringmann LF, Ögmundsson BE, Ólafsson RP. Do daily mood fluctuations activate ruminative thoughts as a mental habit? Results from an ecological momentary assessment study. Behav Res Ther. 2021 05; 140:103832. PMID: 33765651.
    Citations: 1     Fields:    Translation:Humans
  14. Snorrason I, Conway CC, Beard C, Björgvinsson T. The comorbidity structure of fear, distress and compulsive disorders in an acute psychiatric sample. J Anxiety Disord. 2021 04; 79:102370. PMID: 33636680.
    Citations:    Fields:    Translation:Humans
  15. Snorrason I, Ricketts EJ, Stein AT, Thamrin H, Lee SJ, Goldberg H, Hu Y, Björgvinsson T. Sex Differences in Age at Onset and Presentation of Trichotillomania and Trichobezoar: A 120-Year Systematic Review of Cases. Child Psychiatry Hum Dev. 2022 02; 53(1):165-171. PMID: 33420536.
    Citations: 1     Fields:    Translation:Humans
  16. Snorrason I, Beard C, Christensen K, Bjornsson AS, Björgvinsson T. Body dysmorphic disorder is associated with risk for suicidality and inpatient hospitalization: A replication study. Psychiatry Res. 2020 11; 293:113478. PMID: 33198049.
    Citations:    Fields:    Translation:Humans
  17. Peckham AD, Jones P, Snorrason I, Wessman I, Beard C, Björgvinsson T. Age-related differences in borderline personality disorder symptom networks in a transdiagnostic sample. J Affect Disord. 2020 09 01; 274:508-514. PMID: 32663983.
    Citations: 1     Fields:    Translation:Humans
  18. Snorrason I, Beard C, Peckham AD, Björgvinsson T. Transdiagnostic dimensions in obsessive-compulsive and related disorders: associations with internalizing and externalizing symptoms. Psychol Med. 2021 07; 51(10):1657-1665. PMID: 32138800.
    Citations: 3     Fields:    Translation:Humans
  19. Kayser RR, Raskin M, Snorrason I, Hezel DM, Haney M, Simpson HB. Cannabinoid Augmentation of Exposure-Based Psychotherapy for Obsessive-Compulsive Disorder. J Clin Psychopharmacol. 2020 Mar/Apr; 40(2):207-210. PMID: 32068563.
    Citations: 9     Fields:    Translation:Humans
  20. Mathew AS, Davine TP, Snorrason I, Houghton DC, Woods DW, Lee HJ. Body-focused repetitive behaviors and non-suicidal self-injury: A comparison of clinical characteristics and symptom features. J Psychiatr Res. 2020 05; 124:115-122. PMID: 32135390.
    Citations:    Fields:    Translation:Humans
  21. Gillan CM, Kalanthroff E, Evans M, Weingarden HM, Jacoby RJ, Gershkovich M, Snorrason I, Campeas R, Cervoni C, Crimarco NC, Sokol Y, Garnaat SL, McLaughlin NCR, Phelps EA, Pinto A, Boisseau CL, Wilhelm S, Daw ND, Simpson HB. Comparison of the Association Between Goal-Directed Planning and Self-reported Compulsivity vs Obsessive-Compulsive Disorder Diagnosis. JAMA Psychiatry. 2020 01 01; 77(1):77-85. PMID: 31596434; PMCID: PMC6802255.
    Citations: 17     Fields:    Translation:Humans
  22. Pagliaccio D, Middleton R, Hezel D, Steinman S, Snorrason I, Gershkovich M, Campeas R, Pinto A, Van Meter P, Simpson HB, Marsh R. Task-based fMRI predicts response and remission to exposure therapy in obsessive-compulsive disorder. Proc Natl Acad Sci U S A. 2019 10 08; 116(41):20346-20353. PMID: 31548396; PMCID: PMC6789627.
    Citations: 9     Fields:    Translation:Humans
  23. Snorrason I, Beard C, Christensen K, Bjornsson AS, Björgvinsson T. Body dysmorphic disorder and major depressive episode have comorbidity-independent associations with suicidality in an acute psychiatric setting. J Affect Disord. 2019 12 01; 259:266-270. PMID: 31450136.
    Citations: 7     Fields:    Translation:Humans
  24. Ólafsson RP, Guðmundsdóttir SJ, Björnsdóttir TD, Snorrason I. A Test of the Habit-Goal Framework of Depressive Rumination and Its Relevance to Cognitive Reactivity. Behav Ther. 2020 05; 51(3):474-487. PMID: 32402262.
    Citations: 1     Fields:    Translation:Humans
  25. Ricketts EJ, Snorrason I, Kircanski K, Alexander JR, Stiede JT, Thamrin H, Flessner CA, Franklin ME, Keuthen NJ, Walther MR, Piacentini J, Stein DJ, Woods DW. A latent profile analysis of age of onset in trichotillomania. Ann Clin Psychiatry. 2019 08; 31(3):169-178. PMID: 31369656; PMCID: PMC9528732.
    Citations: 4     Fields:    Translation:Humans
  26. Kayser RR, Snorrason I, Haney M, Lee FS, Simpson HB. The Endocannabinoid System: A New Treatment Target for Obsessive Compulsive Disorder? Cannabis Cannabinoid Res. 2019; 4(2):77-87. PMID: 32656342; PMCID: PMC7347041.
    Citations: 11     Fields:    
  27. Snorrason I, Ricketts EJ, Olafsson RP, Rozenman M, Colwell CS, Piacentini J. Disentangling Reward Processing in Trichotillomania: 'Wanting' and 'Liking' Hair Pulling Have Distinct Clinical Correlates. J Psychopathol Behav Assess. 2019 Jun; 41(2):271-279. PMID: 32051656; PMCID: PMC7015260.
    Citations:    
  28. Ricketts EJ, Snorrason I, Rozenman M, Colwell CS, McCracken JT, Piacentini J. Sleep functioning in adults with trichotillomania (hair-pulling disorder), excoriation (skin-picking) disorder, and a non-affected comparison sample. J Obsessive Compuls Relat Disord. 2017 Apr; 13:49-57. PMID: 32467821; PMCID: PMC7255435.
    Citations: 2     
  29. Snorrason I, Walther MR, Elkin TD, Woods DW. Treating Trichotillomania (Hair-Pulling Disorder) in a Child. J Clin Psychol. 2016 11; 72(11):1200-1208. PMID: 27701731.
    Citations: 1     Fields:    Translation:Humans
  30. Snorrason I, Lee HJ, de Wit S, Woods DW. Are nonclinical obsessive-compulsive symptoms associated with bias toward habits? Psychiatry Res. 2016 Jul 30; 241:221-3. PMID: 27183107.
    Citations: 10     Fields:    Translation:Humans
  31. Snorrason I, Olafsson RP, Houghton DC, Woods DW, Lee HJ. 'Wanting' and 'liking' skin picking: A validation of the Skin Picking Reward Scale. J Behav Addict. 2015 Dec; 4(4):250-62. PMID: 26690620.
    Citations: 3     Fields:    Translation:HumansPHPublic Health
  32. Snorrason I, Berlin GS, Lee HJ. Optimizing psychological interventions for trichotillomania (hair-pulling disorder): an update on current empirical status. Psychol Res Behav Manag. 2015; 8:105-13. PMID: 25897268; PMCID: PMC4396507.
    Citations: 5     
  33. Walther MR, Snorrason I, Flessner CA, Franklin ME, Burkel R, Woods DW. The trichotillomania impact project in young children (TIP-YC): clinical characteristics, comorbidity, functional impairment and treatment utilization. Child Psychiatry Hum Dev. 2014 Feb; 45(1):24-31. PMID: 23564261.
    Citations: 14     Fields:    Translation:Humans
  34. Snorrason I, Woods DW. Nail picking disorder (onychotillomania): a case report. J Anxiety Disord. 2014 Mar; 28(2):211-4. PMID: 24291396.
    Citations: 4     Fields:    Translation:Humans
  35. Snorrason I, Stein DJ, Woods DW. Classification of excoriation (skin picking) disorder: current status and future directions. Acta Psychiatr Scand. 2013 Nov; 128(5):406-7. PMID: 23735169.
    Citations: 3     Fields:    Translation:Humans
  36. Snorrason I, Olafsson RP, Flessner CA, Keuthen NJ, Franklin ME, Woods DW. The Skin Picking Impact Scale: Factor structure, validity and development of a short version. Scand J Psychol. 2013 Aug; 54(4):344-8. PMID: 23682651.
    Citations: 2     Fields:    Translation:Humans
  37. Snorrason I, Ricketts EJ, Flessner CA, Franklin ME, Stein DJ, Woods DW. Skin picking disorder is associated with other body-focused repetitive behaviors: findings from an internet study. Ann Clin Psychiatry. 2012 Nov; 24(4):292-9. PMID: 23145386.
    Citations: 7     Fields:    Translation:Humans
  38. Snorrason I, Belleau EL, Woods DW. How related are hair pulling disorder (trichotillomania) and skin picking disorder? A review of evidence for comorbidity, similarities and shared etiology. Clin Psychol Rev. 2012 Nov; 32(7):618-29. PMID: 22917741.
    Citations: 27     Fields:    Translation:Humans
  39. Snorrason I, Bjorgvinsson T. [Diagnosis and treatment of hair pulling- and skin picking disorder]. Laeknabladid. 2012 03; 98(3):155-62. PMID: 22450520.
    Citations:    Fields:    Translation:Humans
  40. Snorrason I, Smári J, Olafsson RP. Emotion regulation in pathological skin picking: findings from a non-treatment seeking sample. J Behav Ther Exp Psychiatry. 2010 Sep; 41(3):238-45. PMID: 20172501.
    Citations: 19     Fields:    Translation:Humans
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Funded by the NIH National Center for Advancing Translational Sciences through its Clinical and Translational Science Awards Program, grant number UL1TR002541.