• The Effect of Situational Experiment Conditions on Hasty Decision Making in the ‘Beads Task’ 

      Klevjer, Kristoffer; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-19)
      Jumping to Conclusions’, or hasty decision making, is widely studied within clinical and computational psychology. It is typically investigated using the ‘beads task’, a sequential information sampling paradigm, and defining one or two draws as jumping to conclusion. Situational experimental conditions, e.g., group vs. individual testing, abstract vs. cover story, show-up fee or course credit, ...
    • Emotional Infant Face Processing in Women With Major Depression and Expecting Parents With Depressive Symptoms 

      Bohne, Agnes; Nordahl, Dag; Lindahl, Åsne; Ulvenes, Pål Gunnar; Wang, Catharina Elisabeth Arfwedson; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-02)
      Processing of emotional facial expressions is of great importance in interpersonal relationships. Aberrant engagement with facial expressions, particularly an engagement with sad faces, loss of engagement with happy faces, and enhanced memory of sadness has been found in depression. Since most studies used adult faces, we here examined if such biases also occur in processing of infant faces in those ...
    • Evaluation of a brief unguided psychological online intervention for depression: A controlled trial including exploratory moderator analyses 

      Lüdtke, Thies; Pult, Lilian K.; Schneider, Brooke C.; Pfuhl, Gerit; Moritz, Steffen (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-28)
      <p><i>Background</i>: Psychological online interventions (POIs) reduce depression but we know little about factors influencing their effectiveness. We evaluated a new, brief POI for depression and conducted exploratory moderator analyses.</p> <p><i>Methods</i>: In this online trial (German Clinical Trials Register; DRKS00011045), we allocated participants to treatment as usual (TAU; n = 67) or ...
    • Expectations of users and non-users of wearable sensors and mobile health applications 

      Henriksen, André; Pfuhl, Gerit; Woldaregay, Ashenafi Zebene; Issom, David-Zacharie; Årsand, Eirik; Sato, Keiichi; Hartvigsen, Gunnar (Chapter; Bokkapittel, 2022-08-22)
      Patient self-management is vital to improved health outcomes for patients with chronic diseases. The objective of this study was to understand the role of wearable sensors in patients’ self-management. A survey encompassing factors related to motivation in mHealth was conducted. Ease of use and sensory accuracy was found most important when choosing a wearable. Manual registration of most health-related ...
    • Global cortical thinning in acute anorexia nervosa normalizes following long-term weight restoration 

      King, Joseph A; Geisler, Daniel; Rischel, Franziska; Schober, Ilka; Seidel, Maria; Roschinski, Benjamin; Soltwedel, Laura; Zwipp, Johannes; Pfuhl, Gerit; Marxen, Michael; Roessner, Veit; Ehrlich, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-09-22)
      <b>Background:</b> Anorexia nervosa (AN) is a serious eating disorder characterized by selfstarvation, extreme weight loss and alterations in brain structure. Structural magnetic resonance imaging (sMRI) studies have documented brain volume reductions in acute AN, but it is unclear whether they are 1) regionally-specific or 2) reversible following weight restoration. Here, we measured cortical ...
    • A global experiment on motivating social distancing during the COVID-19 pandemic 

      Legate, Nicole; Nguyen, Thuy-vy; Weinstein, Netta; Lund, Maria Louise; Klevjer, Kristoffer; Kunst, Jonas R.; Pfuhl, Gerit; Schei, Vidar; Korbmacher, Max; Tamnes, Christian Krog; Bundt, Carsten; Askelund, Adrian Dahl (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-27)
      Finding communication strategies that effectively motivate social distancing continues to be a global public health priority during the COVID-19 pandemic. This cross-country, preregistered experiment (n = 25,718 from 89 countries) tested hypotheses concerning generalizable positive and negative outcomes of social distancing messages that promoted personal agency and reflective choices (i.e., an ...
    • Identifying Resilience Factors of Distress and Paranoia During the COVID-19 Outbreak in Five Countries 

      Mækelæ, Martin Jensen; Reggev, Niv; Defelipe, Renata P.; Dutra, Natalia; Tamayo, Ricardo; Klevjer, Kristoffer; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-10)
      The ongoing COVID-19 pandemic outbreak has affected all countries with more than 100 million confirmed cases and over 2.1 million casualties by the end of January 2021 worldwide. A prolonged pandemic can harm global levels of optimism, regularity, and sense of meaning and belonging, yielding adverse effects on individuals' mental health as represented by worry, paranoia, and distress. Here we studied ...
    • Ignorance or awareness of changes measured in a probabilistic inference task 

      Kreis, Isabel Viola; Tjelmeland, Håkon; Biegler, Robert; Tröbinger, Luzia Rosa; Pfuhl, Gerit (Conference object; Konferansebidrag, 2017)
      A cognitive bias often reported for schizophrenia is the tendency to make decisions based on little evidence, namely the jumping to conclusions (JTC) bias. The beads task (Huq et al., 1988) is the most commonly used task to investigate the JTC and different attempts were made to explain the JTC. One proposition is that patients might miscomprehend the task and assume volatility, i.e. a change of ...
    • Is it cognitive effort you measure? Comparing three task paradigms to the Need for Cognition scale 

      Mækelæ, Martin Jensen; Klevjer, Kristoffer; Westbrook, Andrew; Eby, Noah S.; Lima-Eriksen, Rikke; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-17)
      Measuring individual differences in cognitive effort can be elusive as effort is a function of motivation and ability. We report six studies (N = 663) investigating the relationship of Need for Cognition and working memory capacity with three cognitive effort measures: demand avoidance in the Demand Selection Task, effort discounting measured as the indifference point in the Cognitive Effort ...
    • 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.
    • Liberale akzeptanz als kognitiver mechanismus bei psychose: Eine 2-stufen-theorie der pathogenese schizophrener positivsymptome 

      Moritz, Steffen; Ludtke, Thies; Pfuhl, Gerit; Balzan, Ryan P; Andreou, Christina (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-30)
      Positivsymptome wie Wahn und Halluzinationen stellen definierende Symptome einer (schizophrenen) Psychose dar. In dieser Übersichtsarbeit wird ein 2-stufiges heuristisches Modell für die Entstehung und Aufrechterhaltung psychotischer Positivsymptome vorgelegt. Im Kern der Theorie steht die Hypothese, dass von Psychose betroffene Menschen eine erniedrigte Entscheidungsschwelle aufweisen, die zu ...
    • Metacognition in psychology 

      Norman, Elisabeth; Pfuhl, Gerit; Sæle, Rannveig Grøm; Svartdal, Frode; Låg, Torstein; Dahl, Tove Irene (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-25)
      How has the concept of metacognition been used within basic and applied psychological research? We begin our answer by presenting a broad definition of metacognition, a historical overview of its development and its presence in research databases. To assess which function and facets are most frequently addressed within each of the sub-disciplines, we present results from separate literature searches. ...
    • mHealth: Where Is the Potential for Aiding Informal Caregivers? 

      Bradway, Meghan; Woldaregay, Ashenafi Zebene; Issom, David-Zacharie; Pfuhl, Gerit; Hartvigsen, Gunnar; Årsand, Eirik; Henriksen, André (Journal article; Tidsskriftartikkel; Peer reviewed, 2021)
      The health and well-being of informal caregivers often take a backseat to those that they care for. While systems, technologies, and services that provide care and support for those with chronic illnesses are established and continuously improved, those that support informal caregivers are less explored. An international survey about motivations to use mHealth technologies was posted to online ...
    • A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic 

      Wang, Ke; Kunst, Jonas R.; Tamnes, Christian Krog; Schei, Vidar; Sverdrup, Therese E.; Askelund, Adrian Dahl; Pfuhl, Gerit; Klevjer, Kristoffer; Korbmacher, Max; Bundt, Carsten; Goldberg, Amit; Dorison, Charles A.; Miller, Jeremy K.; Uusberg, Andero; Lerner, Jennifer; Gross, James J; Agesin, Bamikole Bamikole; Bernardo, Marcia; Campos, Olatz; Eudave, Luis; Grzech, Karolina; Ozery, Daphna Hausman; Garcia, Elkin Oswaldo Luis; Jackson, Emily A.; Drexler, Shira Meir; Jurkovic, Anita Penic; Rana, Kafeel; Wilson, John Paul; Antoniadi, Maria; Desai, Kermeka; Gialitaki, Zoi; Kushnir, Elizaveta; Nadif, Khaoula; Bravo, Olalla Nino; Nauman, Rafia; Oosterlinck, Marlies; Pantazi, Myrto; Pilecka, Natalia; Szabelska, Anna; van Steenkiste, I.M.M.; Filip, Katarzyna; Bozdoc, Andrea Ioana; Marcu, Gabriela Mariana; Agadullina, Elena; Adamkovic, Matus; Roczinewska, Marta; Reyana, Cecilia; Kassianos, Angelos P.; Westerlund, Minja; Ahlgren, Lina; Pöntinen, Sara (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-02)
      The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about a situation. Participants from 87 countries and ...
    • A multi-lab test of the facial feedback hypothesis by the Many Smiles Collaboration 

      Coles, Nicholas A.; March, David S.; Marmolejo-Ramos, Fernando; Larsen, Jeff T.; Arinze, Nwadiogo C.; Ndukaihe, Izuchukwu L. G.; Willis, Megan L.; Foroni, Francesco; Reggev, Niv; Mokady, Aviv; Forscher, Patrick S.; Hunter, John F.; Kaminski, Gwenaël; Yüvrük, Elif; Kapucu, Aycan; Nagy, Tamás; Hajdu, Nandor; Tejada, Julian; Freitag, Raquel M. K.; Zambrano, Danilo; Som, Bidisha; Aczel, Balazs; Barzykowski, Krystian; Adamus, Sylwia; Filip, Katarzyna; Yamada, Yuki; Ikeda, Ayumi; Eaves, Daniel L.; Levitan, Carmel A.; Leiweke, Sydney; Parzuchowski, Michal; Butcher, Natalie; Pfuhl, Gerit; Basnight-Brown, Dana M.; Hinojosa, José A.; Montoro, Pedro R.; Javela D, Lady G.; Vezirian, Kevin; IJzerman, Hans; Trujillo, Natalia; Pressman, Sarah D.; Gygax, Pascal M.; Özdoğru, Asil A.; Ruiz-Fernandez, Susana; Ellsworth, Phoebe C.; Gaertner, Lowell; Strack, Fritz; Marozzi, Marco; Liuzza, Marco Tullio (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-20)
      Following theories of emotional embodiment, the facial feedback hypothesis suggests that individuals’ subjective experiences of emotion are influenced by their facial expressions. However, evidence for this hypothesis has been mixed. We thus formed a global adversarial collaboration and carried out a preregistered, multicentre study designed to specify and test the conditions that should most reliably ...
    • Newborn Behavioral Observation, maternal stress, depressive symptoms and the mother-infant relationship: results from the Northern Babies Longitudinal Study (NorBaby) 

      Høifødt, Ragnhild Sørensen; Nordahl, Dag; Landsem, Inger Pauline; Csifcsak, Gabor; Bohne, Agnes; Pfuhl, Gerit; Rognmo, Kamilla; Braarud, Hanne Cecilie; Goksøyr, Arnold Mikal; Moe, Vibeke; Slinning, Kari; Wang, Catharina Elisabeth Arfwedson (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-15)
      <i>Background</i> - Families can experience the postpartum period as overwhelming and many report a special need for support. The Newborn Behavioral Observation (NBO) aims to promote a positive parent-infant relationship by sensitising parents to the infant’s signals. This article evaluates the NBO as a universal preventive intervention within the regular well-baby clinic service on measures of ...
    • Objective Versus Subjective Effort in Schizophrenia 

      Kreis, Isabel Viola; Moritz, Steffen; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-09)
      <i>Background and Objectives</i>: Performance on cognitive tasks is often impaired in individuals with schizophrenia (SCZ), possibly resulting from either cognitive deficits (e.g., limited working memory capacity) or diminished mental effort or both. Investment of mental effort itself can be affected by cognitive resources, task load, and motivational factors and has thus proven difficult to measure. ...
    • On the measurement of procrastination: Comparing two scales in six European countries 

      Svartdal, Frode; Pfuhl, Gerit; Nordby, Kent; Foschi, Gioel; Klingsieck, Katrin; Rozental, Alexander; Carlbring, Per; Lindblom-Ylänne, Sari; Rębkowska, Kaja (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-31)
      Procrastination is a common problem, but defining and measuring it has been subject to some debate. This paper summarizes results from students and employees (N = 2893) in Finland, Germany, Italy, Norway, Poland, and Sweden using the Pure Procrastination Scale (PPS) and the Irrational Procrastination Scale (IPS; Steel, 2010), both assumed to measure unidimensional and closely related constructs. ...
    • Optimizing the RMET to measure bias not performance differences 

      Pfuhl, Gerit; Leif, Ekblad (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-22)
      <p>Background: Human social interaction and communication is complex. Sending a verbal message is often accompanied by intonations, facial expressions, grimaces, and body postures. Nonverbal signals are potentially open for misinterpretation. One popular test for assessing the interpretation of facial expressions is the “Reading the Mind in the Eyes” Test (RMET). This test has been used to relate ...
    • Overestimation of volatility in schizophrenia and autism? A comparative study using a probabilistic reasoning task 

      Kreis, Isabel Viola; Biegler, Robert; Tjelmeland, Håkon; Mittner, Matthias; Reitan, Solveig Merete Klæbo; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-07)
      <i>Background and objectives</i> - A plethora of studies has investigated and compared social cognition in autism and schizophrenia ever since both conditions were first described in conjunction more than a century ago. Recent computational theories have proposed similar mechanistic explanations for various symptoms beyond social cognition. They are grounded in the idea of a general misestimation ...