John Protzko

ORCID: 0000-0001-5710-8635
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About
Contact & Profiles
Research Areas
  • Psychology of Moral and Emotional Judgment
  • Cognitive Abilities and Testing
  • Social and Intergroup Psychology
  • Mental Health Research Topics
  • Cultural Differences and Values
  • Behavioral Health and Interventions
  • Free Will and Agency
  • scientometrics and bibliometrics research
  • Meta-analysis and systematic reviews
  • Early Childhood Education and Development
  • Child and Animal Learning Development
  • Topic Modeling
  • Mind wandering and attention
  • Epistemology, Ethics, and Metaphysics
  • Ethics in Business and Education
  • Child Development and Digital Technology
  • Impact of Technology on Adolescents
  • Psychological Well-being and Life Satisfaction
  • Biomedical and Engineering Education
  • Big Data and Business Intelligence
  • Climate Change Communication and Perception
  • Face Recognition and Perception
  • Cognitive Science and Mapping
  • Child and Adolescent Psychosocial and Emotional Development
  • Interdisciplinary Research and Collaboration

Central Connecticut State University
2021-2025

University of California, Santa Barbara
2015-2024

University of Gothenburg
2022-2023

Comilla University
2023

Universidad de Navarra
2021

University of Michigan
2021

Michigan United
2021

Center for Open Science
2021

Connecticut Children's Medical Center
2021

Northern Illinois University
2021

Hannah Moshontz Lorne Campbell Charles R. Ebersole Hans IJzerman Heather L. Urry and 92 more Patrick S. Forscher Jon Grahe Randy J. McCarthy Erica D. Musser Jan Antfolk Christopher M. Castille Thomas Rhys Evans Susann Fiedler Jessica Kay Flake Diego A. Forero Steve M. J. Janssen Justin Robert Keene John Protzko Balázs Aczél Sara Álvarez Solas Daniel Ansari Dana Awlia Ernest Baskin Carlota Batres Martha Lucia Borras-Guevara Cameron Brick Priyanka Chandel Armand Chatard William J. Chopik David Clarance Nicholas A. Coles Katherine S. Corker Barnaby Dixson Vilius Dranseika Yarrow Dunham Nicholas W. Fox Gwendolyn Gardiner S. Mason Garrison Tripat Gill Amanda Hahn Bastian Jaeger Pavol Kačmár Gwenaêl Kaminski Philipp Kanske Zoltán Kekecs Melissa Kline Monica A. Koehn Pratibha Kujur Carmel Levitan Jeremy K. Miller Ceylan Okan Jerome Olsen Óscar Oviedo-Trespalacios Asil Ali Özdoğru Babita Pande Arti Parganiha Noorshama Parveen Gerit Pfuhl Sraddha Pradhan Ivan Ropovik Nicholas O. Rule Blair Saunders Vidar Schei Kathleen Schmidt Margaret Messiah Singh Miroslav Sirota Crystal N. Steltenpohl Stefan Stieger Daniel Storage Gavin Brent Sullivan Anna Szabelska Christian K. Tamnes Miguel A. Vadillo Jaroslava Varella Valentová Wolf Vanpaemel Marco Antônio Corrêa Varella Evie Vergauwe Mark Verschoor Michelangelo Vianello Martin Voracek Glenn Patrick Williams John Paul Wilson Janis Zickfeld Jack Arnal Burak Aydın Sau-Chin Chen Lisa M. DeBruine Ana María Fernández Kai T. Horstmann Peder Mortvedt Isager Benedict C. Jones Aycan Kapucu Hause Lin Michael C. Mensink Gorka Navarrete Miguel Alejandro A. Silan Christopher R. Chartier

Concerns about the veracity of psychological research have been growing. Many findings in science are based on studies with insufficient statistical power and nonrepresentative samples, or may otherwise be limited to specific, ungeneralizable settings populations. Crowdsourced research, a type large-scale collaboration which one more projects conducted across multiple lab sites, offers pragmatic solution these other current methodological challenges. The Psychological Science Accelerator...

10.1177/2515245918797607 article EN Advances in Methods and Practices in Psychological Science 2018-10-01
Hannah Moshontz Lorne Campbell Charles R. Ebersole Hans IJzerman Heather L. Urry and 92 more Patrick S. Forscher Jon Grahe Randy J. McCarthy Erica D. Musser Jan Antfolk Christopher M. Castille Thomas Rhys Evans Susann Fiedler Jessica Kay Flake Diego A. Forero Jan Janssen Justin Robert Keene John Protzko Balázs Aczél Sara Álvarez Solas Daniel Ansari Dana Awlia Ernest Baskin Carlota Batres Martha Lucia Borras-Guevara Cameron Brick Priyanka Chandel Armand Chatard William J. Chopik David Clarance Nicholas A. Coles Katherine S. Corker Barnaby Dixson Vilius Dranseika Yarrow Dunham Nicholas Fox Gwendolyn Gardiner S. Mason Garrison Tripat Gill Amanda Hahn Bastian Jaeger Pavol Kačmár Gwenaêl Kaminski Philipp Kanske Zoltán Kekecs Melissa Kline Monica A. Koehn Pratibha Kujur Carmel Levitan Jeremy K. Miller Ceylan Okan Jerome Olsen Óscar Oviedo-Trespalacios Asil Ali Özdoğru Babita Pande Arti Parganiha Noorshama Parveen Gerit Pfuhl Sraddha Pradhan Ivan Ropovik Nicholas Rule Blair Saunders Vidar Schei Kathleen Schmidt Margaret Messiah Singh Miroslav Sirota Crystal Steltenpohl Stefan Stieger Daniel Storage Gavin Brent Sullivan Anna Szabelska Christian K. Tamnes Miguel A. Vadillo Jaroslava Varella Valentová Wolf Vanpaemel Marco Antônio Corrêa Varella Evie Vergauwe Mark Verschoor Michelangelo Vianello Martin Voracek William Williams John Paul Wilson Jan Zickfeld Daniel Arnal Burak Aydın Sau-Chin Chen Lisa M. DeBruine Ana María Fernández Kai T. Horstmann Peder Mortvedt Isager Jon Jones Aycan Kapucu Hause Lin Michael C. Mensink Gorka Navarrete Philipp Silan Christopher R. Chartier

Concerns have been growing about the veracity of psychological research. Many findings in science are based on studies with insufficient statistical power and nonrepresentative samples, or may otherwise be limited to specific, ungeneralizable settings populations. Crowdsourced research, a type large-scale collaboration which one more research projects conducted across multiple lab sites, offers pragmatic solution these other current methodological challenges. The Psychological Science...

10.31234/osf.io/785qu preprint EN 2018-04-03
Bence Bagó Márton Kovács John Protzko Tamás Nagy Zoltán Kekecs and 95 more Bence Pálfi Matúš Adamkovič Sylwia Adamus Sumaya Albalooshi Nihan Albayrak‐Aydemir Ilham N. Alfian Sinan Alper Sara Álvarez Solas Sara G. Alves Santiago Amaya Pia K. Andresen Gulnaz Anjum Daniel Ansari Patrí­cia Arriaga John Jamir Benzon R. Aruta Alexiοs Arvanitis Peter Babinčák Krystian Barzykowski Bana Bashour Ernest Baskin Luisa Batalha Carlota Batres Jozef Bavoľár Fatih Bayrak Benjamin Becker Maja Becker Anabel Belaus Michał Białek Ennio Bilancini Daniel Boller Leonardo Boncinelli Jordane Boudesseul Benjamin T. Brown Erin Michelle Buchanan Muhammad Mussaffa Butt Dustin P. Calvillo Nate C. Carnes Jared Celniker Christopher R. Chartier William J. Chopik Poom Chotikavan Hu Chuan-Peng Rockwell F. Clancy Ogeday Çoker Rita C. Correia Vera Ćubela Adorić Carmelo P. Cubillas Stefan Czoschke Yalda Daryani Job de Grefte Wieteke C. de Vries Elif Gizem Demirag Burak Carina Dias Barnaby Dixson Xinkai Du Francesca Dumančić Andrei Dumbravă Natalia Bezerra Dutra Janina Enachescu Celia Esteban‐Serna Luis Eudave Thomas Rhys Evans Gilad Feldman Fatima M. Felisberti Susann Fiedler Andrej Findor Alexandra Fleischmann Francesco Foroni Radka Francová Darius‐Aurel Frank Cynthia H.Y. Fu Shan Gao Omid Ghasemi Ali-Reza Ghazi-Noori Maliki E. Ghossainy Isabella Giammusso Tripat Gill Biljana Gjoneska Mario Gollwitzer Aurélien Graton Maurice Grinberg Agata Groyecka-Bernard Elizabeth A. Harris Andree Hartanto Widad A. N. M. Hassan Javad Hatami Katrina R. Heimark Jasper Hidding Evgeniya Hristova Matej Hruška Charlotte A. Hudson Richard Huskey Ayumi Ikeda Yoel Inbar Gordon P. D. Ingram

10.1038/s41562-022-01319-5 article EN Nature Human Behaviour 2022-04-14

Failures to replicate evidence of new discoveries have forced scientists ask whether this unreliability is due suboptimal implementation methods or presumptively optimal are not, in fact, optimal. This paper reports an investigation by four coordinated laboratories the prospective replicability 16 novel experimental findings using rigour-enhancing practices: confirmatory tests, large sample sizes, preregistration and methodological transparency. In contrast past systematic replication...

10.1038/s41562-023-01749-9 article EN cc-by Nature Human Behaviour 2023-11-09
Igor Grossmann Amanda Rotella Cendri A. Hutcherson Konstantyn Sharpinskyi Michael E. W. Varnum and 95 more Sebastian Achter Mandeep K. Dhami Xinqi Guo Mane Kara-Yakoubian David R. Mandel Louis Raes Louis Tay Aymeric Vié Lisa Wagner Matúš Adamkovič Arash Arami Patrí­cia Arriaga Kasun Bandara Gabriel Baník František Bartoš Ernest Baskin Christoph Bergmeir Michał Białek Caroline K. Børsting Dillon T. Browne Eugene M. Caruso Rong Chen Bin‐Tzong Chie William J. Chopik Robert N. Collins Chin Wen Cong Lucian Gideon Conway Matthew Davis Martin V. Day Nathan A. Dhaliwal Justin D. Durham Martyna Dziekan Christian T. Elbæk Eric Shuman Marharyta Fabrykant Mustafa Firat Geoffrey T. Fong Jeremy A. Frimer Jonathan Gallegos Simon B. Goldberg Anton Gollwitzer Julia Goyal Lorenz Graf‐Vlachy Scott D. Gronlund Sebastian Hafenbrädl Andree Hartanto Matthew J. Hirshberg Matthew J. Hornsey Piers D. L. Howe Anoosha Izadi Bastian Jaeger Pavol Kačmár Yeun Joon Kim Ruslan Krenzler Daniel G. Lannin Hung-Wen Lin Nigel Mantou Lou Verity Y. Q. Lua Aaron W. Lukaszewski Albert L. Ly Christopher R. Madan Maximilian Maier Nadyanna M. Majeed David S. March Abigail A. Marsh Michał Misiak Kristian Ove R. Myrseth Jaime M. Napan Jonathan Nicholas Κωνσταντίνος Νικολόπουλος O Jiaqing Tobias Otterbring Mariola Paruzel‐Czachura Shiva Pauer John Protzko Quentin Raffaelli Ivan Ropovik Robert M. Ross Yefim Roth Espen Røysamb Landon Schnabel Astrid Schütz Matthias Seifert A. Timur Sevincer Garrick Sherman Otto Simonsson Ming‐Chien Sung Chung-Ching Tai Thomas Talhelm Bethany A. Teachman Philip E. Tetlock Dimitrios D. Thomakos Dwight C. K. Tse Oliver Twardus Joshua M. Tybur

10.1038/s41562-022-01517-1 article EN Nature Human Behaviour 2023-02-09
David C. Vaidis Willem W. A. Sleegers Florian van Leeuwen Kenneth G. DeMarree Bjørn Sætrevik and 95 more Robert M. Ross Kathleen Schmidt John Protzko Coby Morvinski Omid Ghasemi Andrew Roberts Jeff Stone Alexandre Bran Amélie Gourdon-Kanhukamwe Ceren Günsoy Lisa S. Moussaoui Andrew R. Smith Armelle Nugier Marie‐Pierre Fayant Ali H. Al‐Hoorie Obed Kwame Appiah Spencer Arbige Benjamin Aubert‐Teillaud Olga Białobrzeska Stéphanie Bordel Valérian Boudjemadi Hilmar Brohmer Quinn Cabooter Mehdi Chahir Ianis Chassang Armand Chatard Y.Y. Chou Sungeun Chung Mioara Cristea Joséphine Daga Gregory John Depow Olivier Desrichard Dmitrii Dubrov Thomas Rhys Evans Séverine Falkowicz Sylvain Ferreira Tim Figureau Valérie Fointiat Théo Friedrich Anastasia S. Gashkova Fabien Girandola Marine Granjon Dmitry Grigoryev Gül Günaydın Şevval Güzel Mahsa Hazrati Mai Helmy Ayumi Ikeda Michael Inzlicht Sara Jaubert Dauren Kasanov Mohammad Mohsen Khoddami Taenyun Kim Kiyoshi Kiyokawa Rabia I. Kodapanakkal Alexandra I. Kosachenko Kortney Maedge John H. Mahaney Marie‐Amélie Martinie Vitor N. Mascheretti Yoriko Matsuda Maxime Mauduy Nicolas Mauny Armand Metzen Eva Moreno‐Bella Miguel Moya Kévin Nadarajah Pegah Nejat Elisabeth Norman Irmak Olcaysoy Ökten Asil Ali Özdoğru Ceyda Ozer Elena Padial-Rojas Yuri G. Pavlov Monica Perusquía-Hernández Dora Proost Aleksandra Niemyjska Odile Rohmer Emre Selçuk Cécile Sénémeaud Yaniv Shani Elena A. Shmeleva Emmelie Simoens Kaitlin A. Smith Alain Somat Hayeon Song Fatih Sönmez Lionel Souchet J.J. Taylor Ilja van Beest Nicolas Van der Linden Steven Verheyen Bruno Verschuère Kévin Vezirian Luc Vieira

According to cognitive-dissonance theory, performing counterattitudinal behavior produces a state of dissonance that people are motivated resolve, usually by changing their attitude be in line with behavior. One the most popular experimental paradigms used produce such change is induced-compliance paradigm. Despite its popularity, replication crisis social psychology and other fields, as well methodological limitations associated paradigm, raise concerns about robustness classic studies this...

10.1177/25152459231213375 article EN cc-by-nc Advances in Methods and Practices in Psychological Science 2024-01-01

Can interventions meaningfully increase intelligence? If so, how? The Database of Raising Intelligence is a continuously updated compendium randomized controlled trials that were designed to intelligence. In this article, the authors examine nearly every available intervention involving children from birth kindergarten, using meta-analytic procedures when more than 3 studies tested similar methods and reviewing too few for meta-analysis. This yielded 4 meta-analyses on effects dietary...

10.1177/1745691612462585 article EN Perspectives on Psychological Science 2013-01-01

Failures to replicate evidence of new discoveries have forced scientists ask whether this unreliability is due suboptimal implementation methods or presumptively optimal are not, in fact, optimal. This paper reports an investigation by four coordinated laboratories the prospective replicability 16 novel experimental findings using rigor-enhancing practices: confirmatory tests, large sample sizes, preregistration, and methodological transparency. In contrast past systematic replication...

10.31234/osf.io/n2a9x preprint EN 2020-09-10

Abstract Given how commonly GPS is now used in everyday navigation, it surprising little research has been dedicated to investigating variations its use and such may relate navigation ability. The present study investigated general dependence, people report using various navigational scenarios, the relationship between these measures spatial abilities (assessed by self-report ability learn layout of a novel environment). dependence an individual’s perceived need usage frequency with which...

10.1186/s41235-024-00545-x article EN cc-by Cognitive Research Principles and Implications 2024-03-19

We view kids these days unfavorably, especially on traits at which we excel, partly because have a biased of the past.

10.1126/sciadv.aav5916 article EN cc-by-nc Science Advances 2019-10-11

Our basic beliefs about reality can be impossible to prove and yet we feel a strong intuitive conviction them, as exemplified by insights that imbue an idea with immediate certainty. Here presented participants worldview such "people's core qualities are fixed" simultaneously elicited aha moment. In the first experiment (N = 3000, which included direct replication), rated truer when they solved anagrams also experienced moments. A second 1564) showed statement moment must perceived for this...

10.1038/s41598-022-05923-3 article EN cc-by Scientific Reports 2022-02-08

Abstract: Background: The Psychological Science Accelerator (PSA) recently completed a large-scale moral psychology study using translated versions of the Oxford Utilitarianism Scale (OUS). However, have no validity evidence. Objective: investigated structural evidence OUS across 15 and produced version-specific reports. Methods: We analyzed data from PSA, which was collected internationally on centralized online questionnaire . also qualitative feedback experts for each version. Results:...

10.1027/2698-1866/a000061 article EN cc-by-nd Psychological Test Adaptation and Development 2024-04-01

Consent forms are a cornerstone of ethical research, required part nearly any study. Important information about the study and risks given in plain view for participants to read agree before conducting research. In online studies, consent form is not participants, but presented them, Meaning, they can skip it. We test whether likely seven studies across three different panels 7,378 people. Using both conservative liberal criteria, we find between 6 8.9% could plausibly forms, 17.8% have...

10.31234/osf.io/npa3b preprint EN 2025-01-13

Abstract Using modern hunter-gatherers to infer about early Homo sapiens only works if at least (a) represent an unbiased sample of humanity, and (b) act in ways similar the behavior . Both these are false, leading problem whether we can draw conclusions from hunter-gatherers.

10.1017/s0140525x24000876 article EN Behavioral and Brain Sciences 2025-01-01

Terror Management Theory (TMT) proposes that when people are made aware of their own death, they more likely to endorse cultural values. TMT is a staple social psychology, being featured prominently in textbooks and the subject much research. The implications associated with significant, as its advocates claim it can partially explain conflicts, intergroup antagonisms, even war. However, considerable ambiguity regarding effect size exists, no preregistered replication death-thought...

10.31234/osf.io/esu9z_v2 preprint EN 2025-02-13

Big Team Science involves multiple sites of independent research labs from potentially all over the world coming together to run same study. The power with which these studies tackle issues replicability and generalizability are unprecedented in Psychological science. Here, we discuss new places can go on top investigating generalizability. 1) leverage collective intelligence identify that foundational specific theories test them; 2) data collection capabilities numerous collect hard reach...

10.31234/osf.io/xktp4_v2 preprint EN 2025-02-22

Terror Management Theory (TMT) proposes that when people are made aware of their own death, they more likely to endorse cultural values. TMT is a staple social psychology, being featured prominently in textbooks and the subject much research. The implications associated with significant, as its advocates claim it can partially explain conflicts, intergroup antagonisms, even war. However, considerable ambiguity regarding effect size exists, no preregistered replication death-thought...

10.31234/osf.io/esu9z_v3 preprint EN 2025-02-23

Terror-management theory (TMT) proposes that when people are made aware of their own death, they more likely to endorse cultural values. TMT is a staple social psychology, featured prominently in textbooks and the subject much research. The implications associated with significant because its advocates claim it can partially explain conflicts, intergroup antagonisms, even war. However, considerable ambiguity regarding effect size exists, no preregistered replication...

10.1177/25152459251328334 article EN cc-by-nc Advances in Methods and Practices in Psychological Science 2025-04-01

We attempted to replicate a self-affirmation intervention that produced 40% reduction in the academic achievement gap among at-risk students. The was designed as protection against stereotype threat—, which creates stress and suppresses performance, engagement, learning of students stereotyped intellectually inferior. In previous research, Black Hispanic who engaged values-affirmation exercise significantly improved their performance over course school semester. these salutary effects both...

10.1177/1948550616646426 article EN Social Psychological and Personality Science 2016-04-26

Measurement involves numerous theoretical and empirical steps—ensuring our measures are operating the same in different groups is one step. invariance occurs when factor loadings item intercepts or thresholds of a scale operate similarly for people at level latent variable groups. This commonly assumed to mean measuring thing those Here we test assumption extending measurement common by randomly assigning American adults ( N = 1500) fill out scales assessing coherent (search meaning life)...

10.1177/00131644241282982 article EN Educational and Psychological Measurement 2024-10-28
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