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Abstract

We conducted pre-registered replications of 15 effects in the field of judgment and decision making (JDM). We aimed to test the generalizability of different classical and modern JDM effects, including, among others: less-is- better, anchoring, and framing to different languages, cultures, or current situations (COVID-19 pandemic). Replicated studies were selected and conducted by undergraduate psychology students enrolled in a decision-making course. Two hundred and two adult volunteers completed an online battery of replicated studies. With a classical significance criterion (p < .05), seven effects were successfully replicated (47%), five partially replicated (33%), and three did not replicate (20%). Even though research materials differed from the originals in several ways, the replication rate in our project is slightly above earlier reported findings in similar replication projects. We discuss factors that may underlie replication results (success vs. failure). We also stress the role of open science practices such as open data, open research materials, pre-registration, and registered reports in improving the replicability of results in the JDM field.
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Authors and Affiliations

Agata Sobkow
1
ORCID: ORCID
Marcin Surowski
1
ORCID: ORCID
Angelika Olszewska
1
ORCID: ORCID
Nina Antoniewska
1
Katarzyna Barcik
1
Urszula Bartkiewicz
1
Agnieszka Brzeska
1
Adrianna Brzozowska
1
Oliwia Budrewicz
1
Jakub Choja
1
Kamila Choma
1
Patrycja Chorbotowicz
1
Michalina Filimoniak
1
Łukasz Filip
1
Paweł Gambuś
1
Weronika Gierlik
1
Tomasz Gonczar
1
Katarzyna Goryczka
1
Maksymilian Góra
1
Marta Haczek
1
Weronika Hetmańczuk
1
Zuzanna Holka
1
Aneta Janosz
1
Nikola Kikowska
1
Joanna Kołcun
1
Zuzanna Kozłowska
1
Monika Kujawińska
1
Marcin Kuleszczyk
1
Aleksandra Lach-Galińska
1
Katarzyna Latacz
1
Adam Ławniczak
1
Katarzyna Majewska
1
Klaudia Makowska
1
Marta Mamzer
1
Iga Marciniszyn
1
Adam Masternak
1
Magdalena Matuszek
1
Jonasz Mehr
1
Ewelina Miela
1
Monika Mleczko
1
Paulina Morga
1
Magdalena Niemczyk
1
Damian Ostrowski
1
Jagoda Pełdiak
1
Kamil Piotrowicz
1
Antoni Płuciennik
1
Oskar Ryśkiewicz
1
Weronika Sekuła
1
Małgorzata Sikora
1
Natalia Sikora
1
Daria Sitko
1
Agata Sobczak
1
Julia Sosenko
1
Sonia Stando
1
Katarzyna Starek
1
Łukasz Ślak
1
Jagoda Świtała
1
Natalia Świtniewska
1
Agnieszka Tyc
1
Olga Urban
1
Natalia Wcisło
1
Katarzyna Wiśniewska
1
Joanna Wodzińska
1
Aleksandra Zabiełło
1
Monika Żygadło
1
Tomasz Zaleskiewicz
1
ORCID: ORCID
Jakub Traczyk
1
ORCID: ORCID

  1. SWPS University of Social Sciences and Humanities; Faculty of Psychology in Wroclaw

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