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  • Treatment effects on compulsive exercise and physical activity in eating disorders 

    Mathisen, Therese Fostervold; Bratland-Sanda, Solfrid; Rosenvinge, Jan H; Friborg, Oddgeir; Pettersen, Gunn; Vrabel, Kari-Anne; Sundgot-Borgen, Jorunn (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-13)
    Background:<br> Dysfunctional thoughts- and use of physical activity (PA) are core symptoms of the eating disorders (ED) bulimia nervosa (BN) and binge eating disorder (BED). The compulsive desire for PA complicates a favourable treatment outcome; hence, regular, adapted PA led by personnel with competence in exercise science is rarely part of treatment of BN and BED. The present study compared ...
  • Justify your alpha 

    Lakens, Daniel; Adolfi, Federico G; Albers, Casper J; Anvari, Farid; Apps, M A J; Argamon, Shlomo E; Baguley, Thom; Becker, Raymond B; Benning, Stephen D; Bradford, D E; Buchanan, Erin M; Caldwell, Aaron R; Calster, Ben van; Carlsson, Rickard; Chen, Sau-Chin; Chung, Bryan; Colling, Lincoln J; Collins, G S; Crook, Zander; Cross, Emily S; Daniels, Sameera; Danielsson, Henrik; DeBruine, Lisa; Dunleavy, Daniel J; Earp, Brian D; Feist, Michele I; Ferrell, Jason D; Field, James G; Fox, Nicholas W; Friesen, Amanda; Gomes, Caio; Gonzalez-Marquez, Monica; Grange, James A; Grieve, Andrew P; Guggenberger, Robert; Grist, James; van Harmelen, Anne-Laura; Hasselman, Fred; Hochard, Kevin D; Hoffarth, Mark R; Holmes, Nicholas; Ingre, Michael; Isager, Peder Mortvedt; Isotalus, Hanna K; Johansson, Christer; Juszczyk, Konrad; Kenny, David; Khalil, Ahmed; Konat, Barbara; Lao, Junpeng; Larsen, Erik Gahner; Lodder, Gerine M A; Lukavsky, Jiri; Madan, Christopher R; Manheim, David; Martin, Stephen R.; Martin, Andrea E; Mayo, Deborah G; McCarthy, Randy; McConway, Kevin; McFarland, Colin; Nio, Amanda Q X; Nilsonne, Gustav; de Oliveira, Cilene Lino; de Xivry, Jean-Jacques Orban; Parsons, Sam; Pfuhl, Gerit; Quinn, Kimberly A; Sakon, John J; Saribay, S Adil; Schneider, Iris K; Selvaraju, Manojkumar; Sjoerds, Zsuzsika; Smith, Samuel G; Smits, Tim; Spies, Jeffrey R; Sreekumar, Vishnu; Steltenpohl, Crystal N; Stenhouse, Neil; Swiatkowski, Wojciech; Vadillo, Miguel A; Van Assen, Marcel A. L. M.; Williams, Matt; Williams, Samantha E; Williams, Donald R.; Yarkoni, Tal; Ziano, Ignazio; Zwaan, Rolf A (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-26)
    In response to recommendations to redefine statistical significance to p ≤ .005, we propose that researchers should transparently report and justify all choices they make when designing a study, including the alpha level.
  • Effects of cognitive behavior therapy on eating behaviors, affective symptoms, and weight loss after bariatric surgery: a randomized clinical trial 

    Hjelmesæth, Jøran; Rosenvinge, Jan H; Gade, Hege; Friborg, Oddgeir (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-15)
    <p><i>Background</i>: The long-term effects of presurgical psychological interventions on weight loss, eating behaviors, affective symptoms, and health-related quality of life remain uncertain. This study aimed to assess the 4-year effects of cognitive behavioral therapy (CBT) before bariatric surgery on these outcomes.</p> <p><i>Methods</i>: Single-center randomized controlled parallel-group ...
  • Managing Risk of Non-Communicable Diseases in Women with Bulimia Nervosa or Binge Eating Disorders: A Randomized Trial with 12 Months Follow-Up 

    Mathisen, Therese Fostervold; Sundgot-Borgen, Jorunn; Rosenvinge, Jan H; Bratland-Sanda, Solfrid (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-03)
    Persons with bulimia nervosa (BN) or binge eating disorder (BED) have an elevated risk of non-communicable diseases (NCDs). However, lowering this risk is rarely addressed in standard cognitive-behavioral treatment (CBT). We aimed to compare CBT with an intervention combining physical exercise and dietary therapy (PED-t), and hypothesized that the PED-t would do better than CBT in lowering the risk ...
  • Stereotype threat in sport: Recommendations for applied practice and research 

    Smith, Daniel; Martiny, Sarah E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12)
    Stereotype-threat theory holds that activation of a negative stereotype has a harmful effect on performance in cognitive and motor domains. This paper provides a literature review of stereotype-threat research in the motor domain followed by recommendations for sport psychology practitioners. The review discusses the most widespread stereotypes that exist in sport, the effects of stereotype activation ...
  • Action-associated modulation of visual event-related potentials evoked by abstract and ecological stimuli 

    Csifcsak, Gabor; Balla, Viktoria Roxana; Dalos, Vera Daniella; Kilencz, Tunde; Biro, Edit Magdolna; Urban, Gabor; Szaloki, Szilvia (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2018-09-19)
    This study investigated the influence of action‐associated predictive processes on visual ERPs. In two experiments, we sought evidence for sensory attenuation (SA) indexed by ERP amplitude reductions for self‐induced stimuli when compared to passive viewing of the same images. We assessed if SA is (a) present for both ecological and abstract stimuli (pictures depicting hands or checkerboards), (b) ...
  • Hippocampal Subfields in Adolescent Anorexia Nervosa 

    Myrvang, Anna Dahl; Vangberg, Torgil Riise; Stedal, Kristin; Rø, Øyvind; Endestad, Tor; Rosenvinge, Jan H; Aslaksen, Per M (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-25)
    Patients with anorexia nervosa (AN) exhibit volume reduction in cerebral gray matter (GM), and several studies report reduced hippocampus volume. The hippocampal subfields (HS) are functionally and structurally distinct, and appear to respond differently to neuropathology. The aim of this study was to investigate HS volumes in adolescent females with restrictive AN compared to a healthy age-matched ...
  • Behavioral responses to emotional challenges in female rats living in a seminatural environment: The role of estrogen receptors 

    Le Moene, Olivia; Ågmo, Anders j (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2018-11-06)
    Estrogen receptors (ERs) are involved in sexual as well as non-sexual behaviors. In the present study we assessed the effects of stimuli inducing positive or negative affect on sociosexual, exploratory and fear-related behaviors of female rats housed in groups (4 females, 3 males) in a seminatural environment. Ovariectomized females were treated with oil, 17β‑estradiol benzoate (EB, 18 μg/kg), the ...
  • Manual dexterity in young and healthy older adults. 1. Age- and gender-related differences in unimanual and bimanual performance 

    Vasylenko, Olena; Gorecka, Marta Maria; Rodriguez-Aranda, Claudia
    This study aimed to better characterize age‐related differences in dexterity by using an integrative approach where movement times and kinematics were measured for both hands. Forty‐five young (age 19–31) and 55 healthy older adults (age 60–88) were evaluated during unimanual and bimanual performance of the Purdue Pegboard Test. Gender effects were also assessed. From video‐recorded data, movement ...
  • Mate Choice could be Random in Female Rats (Rattus norvegicus) 

    Le Moene, Olivia; Snoeren, Eelke (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2017-11-01)
    Female mate choice is often investigated in terms of reproductive success in order to understand how male characteristics contribute to sexual attractiveness. Previous studies have found that females rats prefer mating with their first encounter rather than males visited subsequently, suggesting that the rewarding value of this first encounter is enough to reinforce mating with the first partner. ...
  • Kunnskapsoppsummering og klassifisering av tiltaket FRIENDS for life (behandling) 

    Sæle, Rannveig Grøm; Sagatun, Åse (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-28)
    <p><i>BAKGRUNN</i>: Denne artikkelen er en kunnskapsoppsummering av effektene av tiltaket FRIENDS for life, et behandlingsprogram for barn og ungdommer med angst. Tiltaket er tilrettelagt for grupper, men kan også brukes individuelt. FRIENDS har som mål å hjelpe barn og ungdommer med å utvikle ferdigheter og kunnskaper som gjør dem bedre rustet til å håndtere angstprovoserende situasjoner. I Norge ...
  • Are adolescent elite athletes less psychologically distressed than controls? A cross-sectional study of 966 Norwegian adolescents 

    Rosenvinge, Jan H; Sundgot-Borgen, Jorunn; Pettersen, Gunn; Martinsen, Marianne; Stornæs, Annett Victoria; Pensgaard, Anne Marte (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-16)
    <p><i>Introduction</i>: Psychological distress is increasing among adolescents and clusters with other mental health problems such as eating problems. The aim of this study was to investigate the prevalence of psychological distress among young elite athletes and age-matched controls and whether prevalence figures may be attributed to perfectionism and eating problems.</p> <p><i>Methods</i>: ...
  • Does exposure to counterstereotypical role models influence girls' and women's gender stereotypes and career choices? A review of social psychological research 

    Olsson, Maria; Martiny, Sarah E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-07)
    Gender roles are formed in early childhood and continue to influence behavior through adolescence and adulthood, including the choice of academic majors and careers. In many countries, men are underrepresented in communal roles in health care, elementary education, and domestic functions (HEED fields, Croft et al., 2015), whereas women are underrepresented in the science, technology, engineering, ...
  • Evidence for Cognitive Placebo and Nocebo Effects in Healthy Individuals 

    Turi, Z; Bjørkedal, Espen; Gunkel, Luisa; Antal, Andrea; Paulus, Walter; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-28)
    Inactive interventions can have significant effects on cognitive performance. Understanding the generation of these cognitive placebo/nocebo effects is crucial for evaluating the cognitive impacts of interventional methods, such as non-invasive brain stimulation (NIBS). We report both cognitive placebo and nocebo effects on reward-based learning performance induced using an active sham NIBS protocol, ...
  • Exploring Personality and Readiness to Change in Patients With Substance Use Disorders With and Without ADHD 

    Flores, Lizbett; Ytterstad, Elinor; Lensing, Michael B.; Eisemann, Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
    <p><i>Objective</i>: To explore personality and readiness to change among substance use disorders (SUD) patients with and without ADHD.</p> <p><i>Method</i>: SUD + ADHD versus SUD − ADHD patients consecutively entering treatment between 2010 and 2012 were compared concerning personality (Temperament and Character Inventory) and readiness to change (Stages of Change Readiness and Treatment Eagerness ...
  • Are psychotic experiences related to poorer reflective reasoning? 

    Mækelæ, Martin Jensen; Moritz, Steffen; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-12)
    <p><i>Background</i>: Cognitive biases play an important role in the formation and maintenance of delusions. These biases are indicators of a weak reflective mind, or reduced engaging in reflective and deliberate reasoning. In three experiments, we tested whether a bias to accept non-sense statements as profound, treat metaphorical statements as literal, and suppress intuitive responses is related ...
  • 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 ...
  • Discrepancies in the spiking threshold and frequency sensitivity of nocturnal moths explainable by biases in the canonical auditory stimulation method 

    Thevenon, Hervé Emile Louis; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-11)
    The auditory stimulation method used in experiments on moth A cell(s) is generally believed to be adequate to characterize the encoding of bat echolocation signals. The stimulation method hosts, though, several biases. Their compounded effects can explain a range of discrepancies between the reported electrophysiological recordings and significantly alter the current interpretation. To test the ...
  • Predictors of respiratory protective equipment use in the Norwegian smelter industry: The role of the Theory of Planned Behavior, safety climate and work experience in understanding protective behavior. 

    Robertsen, Øystein; Siebler, Frank; Eisemann, Martin; Hegseth, Marit Nøst; Føreland, Solveig; Vangberg, Hans Christian Bones (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-08)
    Previous research has revealed a higher prevalence of respiratory symptoms in Norwegian smelter workers compared to average population controls. Nevertheless, respiratory protective equipment (RPE) is not always used, even in situations with high exposure risk. A questionnaire was distributed to workers in the Norwegian smelting industry to investigate the relationship between psychological ...
  • Failure to Find a Conditioned Placebo Analgesic Response 

    Flaten, Magne; Bjørkedal, Espen; Lyby, Peter Solvoll; Figenschau, Yngve Anton; Aslaksen, Per M (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-30)
    <p><i>Background</i>: Associative learning has, in several studies, been modulated by the sex of the participant. Consistent with this, a recent review found that conditioned nocebo effects are stronger in females than in males.</p> <p><i>Purpose</i>: It has been suggested that conditioned placebo responses are stronger in females, and this hypothesis was investigated in the present study. Cortisol ...

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