• Childhood trauma and outcome trajectories in patients with longstanding eating disorders across 17 years 

      Eielsen, Hanna Kristine Punsvik; Ulvenes, Pål Gunnar; Hoffart, Asle; Rø, Øyvind; Rosenvinge, Jan Harald; Vrabel, KariAnne (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-27)
      Background: A large proportion of patients with eating disorders (ED) report experiences of childhood trauma. Latent trajectory analysis in ED samples reveals the complexities in course and outcome and can explore the long-term impact of adverse experiences in childhood.<p> <p>Method: A total of 84 patients with longstanding ED were included. ED symptoms were assessed by the Eating Disorder ...
    • Children’s Well-being during the COVID-19 pandemic: Relationships with attitudes, family structure, and mothers’ Well-being 

      Martiny, Sarah E.; Thorsteinsen, Kjærsti; Parks-Stamm, Elizabeth J.; Olsen, Marte; Kvalø, Marie (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-07)
      COVID-19 triggered social restrictions worldwide including the shutdown of schools. Whereas research has documented the negative effects on parents’ well-being, less is known about children’s well-being during the pandemic. We investigated the well-being, emotions, and COVID-19-related attitudes of 87 Norwegian elementary children (42 boys, 45 girls; M<sub>age</sub> = 9.66 years, SD = 1.77) and their ...
    • The Clinical Effectiveness of Web-Based Cognitive Behavioral Therapy With Face-to-Face Therapist Support for Depressed Primary Care Patients: Randomized Controlled Trial 

      Høifødt, Ragnhild Sørensen; Lillevoll, Kjersti; Griffiths, Kathleen M; Wilsgaard, Tom; Eisemann, Martin; Waterloo, Knut; Kolstrup, Nils (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-08-05)
    • Co-occurrence of avoidant personality disorder and child sexual abuse predicts poor outcome in longstanding eating disorders 

      Rosenvinge, Jan H.; Vrabel, KariAnne R.; Hoffart, Asle; Rø, Øyvind; Martinsen, Egil W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2009-12-16)
      Few consistent predictive factors for eating disorder have been identified across studies. In the current five year prospective study, the objective was to examine whether (1) personality disorder and child sexual abuse predict the course of severity of eating disorder symptoms after inpatient treatment and (2) how the predictors interact. A total of 74 patients with long standing eating disorder ...
    • The coming PIN code epidemic: A survey study of memory of numeric security codes 

      Rasmussen, Martin; Rudmin, Floyd Webster (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
      Most people must remember various numeric passwords, security codes and PIN numbers for banking, credit cards, debit cards, online accounts, mobile phones, door locks, luggage locks, etc. One pilot study (N=13) developed a list of eleven strategies for remembering numeric codes, and another (N=15) optimized the research questionnaire which asked respondents about a) the number of security codes they ...
    • Commentary: Transcranial stimulation of the frontal lobes increases propensity of mind-wandering without changing meta-awareness 

      Csifcsák, Gábor; Boayue, Nya Mehnwolo; Aslaksen, Per M; Turi, Zsolt; Antal, Andrea; Groot, Josephine; Hawkins, Guy E.; Forstmann, Birte U.; Opitz, Alexander; Thielscher, Axel; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-05)
      A Commentary on <p> <p>Transcranial stimulation of the frontal lobes increases propensity of mind-wandering without changing meta-awareness<p> <p>by Axelrod, V., Zhu, X., & Qui, J. (2018). <i>Scientific Reports</i>, 8:15975. doi: 10.1038/s41598-018-34098-z
    • Communicating public avalanche warnings – what works? 

      Engeset, Rune; Pfuhl, Gerit; Landrø, Markus; Mannberg, Andrea; Hetland, Audun (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-20)
      Like many other mountainous countries, Norway has experienced a rapid increase in both recreational winter activities and fatalities in avalanche terrain during the past few decades: during the decade 2008–2017, 64 recreational avalanche fatalities were recorded in Norway. This is a 106% increase from that of the previous decade. In 2013, Norway therefore launched the National Avalanche Warning ...
    • Comorbidity of personality disorders in anxiety disorders : a meta-analysis of 30 years of research 

      Friborg, Oddgeir; Martinussen, Monica; Kaiser, Sabine; Øvergård, Karl-Tore; Rosenvinge, Jan H (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Background. A comprehensive meta-analysis to identify the proportions of comorbid personality disorders (PD) across the major subtypes of anxiety disorders (AD) has not previously been published. Methods. A literature search identified 125 empirical papers from the period 1980-2010 on patients with panic disorders, social phobia, generalised anxiety, obsessive-compulsive (OCD) and post-traumatic ...
    • A comparison of behavioral and psychological characteristics of patients opting for surgical and conservative treatment for morbid obesity 

      Kvalem, Ingela Lundin; Bergh, Irmelin; von Soest, Tilmann; Rosenvinge, Jan H; Johnsen, Tina Avantis; Martinsen, Egil Wilhelm; Mala, Tom; Kristinsson, Jon Adalsteinn (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-02-05)
      Background Little is known about the psychological prerequisites for weight loss maintenance after bariatric surgery. A first step in investigating whether existing knowledge of conservative weight loss treatment is applicable for lifestyle interventions postoperatively is to compare specific psychological characteristics at baseline. The aim of this study was to compare patients scheduled for ...
    • Conducting Fieldwork with San and Hadza (Post-)Hunter-Gatherer Communities in Africa: Regulatory and Ethical Issues 

      Abels, Monika; Ninkova, Velina (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-28)
      In this paper, we address some of the challenges and opportunities of conducting international research in psychology. We examine issues that arise from working in contexts that differ substantially from those in which most psychological research is still conducted. We take our experiences with Tanzanian and Namibian (post-)hunter-gatherers as a starting point for discussing regulatory and ethical ...
    • The Confidence Database 

      Rahnev, Dobromir; Desender, Kobe; Lee, Alan L. F.; Adler, William T.; Aguilar-Lleyda, David; Akdoğan, Başak; Arbuzova, Polina; Atlas, Lauren Y.; Balcı, Fuat; Bang, Ji Won; Bègue, Indrit; Birney, Damian P.; Brady, Timothy F.; Calder-Travis, Joshua; Chetverikov, Andrey; Clark, Torin K.; Davranche, Karen; Denison, Rachel N.; Dildine, Troy C.; Double, Kit S.; Duyan, Yalçın A.; Faivre, Nathan; Fallow, Kaitlyn; Filevich, Elisa; Gajdos, Thibault; Gallagher, Regan M.; de Gardelle, Vincent; Gherman, Sabina; Haddara, Nadia; Hainguerlot, Marine; Hsu, Tzu-Yu; Hu, Xiao; Iturrate, Iñaki; Jaquiery, Matt; Kantner, Justin; Koculak, Marcin; Konishi, Mahiko; Koß, Christina; Kvam, Peter D.; Kwok, Sze Chai; Lebreton, Maël P.; Lempert, Karolina M.; Ming Lo, Chien; Luo, Liang; Maniscalco, Brian; Martin, Antonio; Massoni, Sébastien; Matthews, Julian; Mazancieux, Audrey; Merfeld, Daniel M.; O’Hora, Denis; Palser, Eleanor R.; Paulewicz, Borysław; Pereira, Michael; Peters, Caroline; Philiastides, Marios G.; Pfuhl, Gerit; Prieto, Fernanda; Rausch, Manuel; Recht, Samuel; Reyes, Gabriel; Rouault, Marion; Sackur, Jérôme; Sadeghi, Saeedeh; Samaha, Jason; Seow, Tricia X. F.; Shekhar, Medha; Sherman, Maxine T.; Siedlecka, Marta; Skóra, Zuzanna; Song, Chen; Soto, David; Sun, Sai; van Boxtel, Jeroen J. A.; Wang, Shuo; Weidemann, Christoph T.; Weindel, Gabriel; Wierzchoń, Michał; Xu, Xinming; Ye, Qun; Yeon, Jiwon; Zou, Futing; Zylberberg, Ariel (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-03)
      Understanding how people rate their confidence is critical for the characterization of a wide range of perceptual, memory, motor and cognitive processes. To enable the continued exploration of these processes, we created a large database of confidence studies spanning a broad set of paradigms, participant populations and fields of study. The data from each study are structured in a common, easy-to-use ...
    • The Consumer Science of Sharing: A Discussant's Observations 

      Rudmin, Floyd Webster (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-03-09)
      This discussant’s response to the collected articles on the consumer behavior of sharing draws on a 1983–99 record of research on the psychology of ownership and property. The major recommendations here are: (1) that sharing be defined as the simultaneous or sequential use of an object (e.g., car), a space (e.g., living room), or an intangible (e.g., identity) by more than one individual; (2) that ...
    • A cooperative function for multisensory stimuli in the induction of approach behavior of a potential mate 

      Agmo, Anders; Snoeren, Eelke (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-17)
      Intrasexual competition is an important element of natural selection in which the most attractive conspecific has a considerable reproductive advantage over the others. The conspecifics that are approached first often become the preferred mate partners, and could thus from a biological perspective have a reproductive advantage. This underlines the importance of the initial approach and raises the ...
    • CORE-OM as a routine outcome measure for adolescents with emotional disorders: factor structure and psychometric properties 

      Lorentzen, Veronica; Handegård, Bjørn Helge; Moen, Connie Malén; Solem, Kenth; Lillevoll, Kjersti; Skre, Ingunn (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-20)
      <i>Background</i> - Instruments for monitoring the clinical status of adolescents with emotional problems are needed. The Clinical Outcomes in Routine Evaluation-Outcome Measure (CORE-OM) according to theory measures problems/symptoms, well-being, functioning and risk. Documentation of whether the theoretical factor structure for CORE-OM is applicable for adolescents is lacking.<p><p> <i>Methods</i> ...
    • Cortisol levels and cognitive profile in major depression: A comparison of currently and previously depressed patients 

      Høifødt, Ragnhild Sørensen; Waterloo, Knut; Wang, Catharina Elisabeth Arfwedson; Eisemann, Martin; Figenschau, Yngve Anton; Halvorsen, Marianne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-22)
      The association between depressive symptoms and elevated cortisol levels, and depression and cognitive functioning, has been less robust in outpatients with symptoms in the mild to moderate range. Furthermore, the association between elevated cortisol levels and cognitive functioning is unclear. In the present study, currently depressed (<i>n</i> = 37), previously depressed (<i>n</i> = 81) and never ...
    • Covid-19 pandemic lessons: uncritical communication of test results can induce more harm than benefit and raises questions on standardized quality criteria for communication and liability 

      Porzsolt, Franz; Pfuhl, Gerit; Kaplan, Robert M; Eisemann, Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-21)
      Background - The COVID-19 pandemic is characterized by both health and economic risks. A ‘safety loop’ model postulates risk-related decisions are not based on objective and measurable risks but on the subjective perception of those risks. We here illustrate a quantification of the difference between objective and subjective risks.<p> <p>Method - The objective risks (or chances) can be obtained ...
    • A creative destruction approach to replication: Implicit work and sex morality across cultures 

      Tierney, Warren; Hardy III, Jay; Ebersole, Charles R; Viganola, Domenico; Clemente, Elena Giulia; Gordon, Michael; Hoogeveen, Suzanne; Haaf, Julila; Dreber, Anna; Johannesson, Magnus; Pfeiffer, Thomas; Huang, Jason L.; Vaughn, Ann; DeMarree, Kenneth; Igou, Eric R.; Chapman, Hanah; Gantman, Ana; Pfuhl, Gerit; Uhlmann, Eric Luis (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-03)
      How can we maximize what is learned from a replication study? In the creative destruction approach to replication, the original hypothesis is compared not only to the null hypothesis, but also to predictions derived from multiple alternative theoretical accounts of the phenomenon. To this end, new populations and measures are included in the design in addition to the original ones, to help determine ...
    • The cross-cultural validity of the Resilience Scale for Adults: A comparison between Norway and Brazil 

      Hjemdal, Odin; Roazzi, A.; Dias, M G; Friborg, Oddgeir (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-18)
      Background: The resilience construct is of increasing interest in clinical and health psychology. The Resilience Scale for Adults (RSA) is a measure of protective factors. The evidence supporting its construct validity is good, however evidence of cross-cultural validity is modest. The present study explored the factorial invariance of the RSA across a Brazilian and a Norwegian sample, as well as ...
    • Crowdsourcing Hypothesis Tests: Making Transparent How Design Choices Shape Research Results 

      Landy, Justin F; Jia, Miaolei; Ding, Isabel L; Viganola, Domenico; Tierney, Warren; Dreber, Anna; Johannesson, Magnus; Pfeiffer, Thomas; Ebersole, Charles R; Gronau, Quentin F; Pfuhl, Gerit; Ly, Alexander; van den Bergh, Don; Marsman, Maarten; Derks, Koen; Wagenmakers, Eric-Jan; Proctor, Andrew; Bartels, Daniel M.; Bauman, Christopher W.; Brady, William J.; Cheung, Felix; Cimpian, Andrei; Dohle, Simone; Donnellan, M. Brent; Hahn, Adam; Hall, Michael P.; Jiménez-Leal, William; Johnson, David J.; Lucas, Richard E.; Monin, Benoît; Montealegre, Andres; Mullen, Elizabeth; Pang, Jun; Ray, Jennifer; Reinero, Diego A.; Reynolds, Jesse; Sowden, Walter; Storage, Daniel; Su, Runkun; Tworek, Christina M.; Van Bavel, Jay J.; Walco, Daniel; Wills, Julian; Xu, Xiaobing; Yam, Kai Chi; Yang, Xiaoyu; Cunningham, William A.; Schweinsberg, Martin; Urwitz, Molly; Uhlmann, Eric L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-16)
      To what extent are research results influenced by subjective decisions that scientists make as they design studies? Fifteen research teams independently designed studies to answer five original research questions related to moral judgments, negotiations, and implicit cognition. Participants from 2 separate large samples (total N 15,000) were then randomly assigned to complete 1 version ...
    • Cutoff criteria for the placebo response: a cluster and machine learning analysis of placebo analgesia. 

      Aslaksen, Per M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-28)
      Computations of placebo effects are essential in randomized controlled trials (RCTs) for separating the specific effects of treatments from unspecific effects associated with the therapeutic intervention. Thus, the identification of placebo responders is important for testing the efficacy of treatments and drugs. The present study uses data from an experimental study on placebo analgesia to suggest ...