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- 2026-04-01
Investigating the reproducibility of the social and behavioural sciences
Published claims should be reproducible, yielding the same result when the same analysis is applied to the same data. Here we assess reproducibility in a stratified random sample of 600 papers published from 2009 to 2018 in 62 journals spanning the social and behavioural sciences. The authors of 144 (24.0%, 95% confidence interval (CI) = 20.8–27.6%) papers made data available to assess reproducibility and, for 38 others, we obtained source data to reconstruct the dataset. We assessed 143 out of the 182 available datasets and found that 76.6 (53.6%, 95% CI = 45.8–60.7%) papers were rated as precisely reproducible and 105.0 (73.5%, 95% CI = 66.4–80.0%) were rated as at least approximately reproducible (within 15% of the original effects or within 0.05 of original P values) after inverse weighting each of the 551 claims by the number of claims per paper. We observed higher reproducibility for papers from political science and economics compared with other fields, for more recent papers compared with older papers and for papers from journals that require data sharing. Implementation of measures to verify that research is reproducible is needed to support trustworthiness in the complex enterprise of knowledge production. - 2026
Prawo spadkowe, rodzinne i opiekuńcze. Kazusy
Publikacja zawiera zbiór kazusów z rozwiązaniami z zakresu prawa spadkowego oraz prawa rodzinnego i opiekuńczego. Każdy kazus został starannie opracowany według jednolitego i logicznego schematu, obejmującego stan faktyczny, pytania problemowe, wskazanie podstawy prawnej oraz rozwiązanie. Zróżnicowany stopień trudności pozwala stopniowo rozwijać umiejętności analizy, argumentacji i prawidłowej kwalifikacji prawnej zdarzeń. Opracowanie nie ogranicza się jedynie do zagadnień z zakresu prawa materialnego, ponieważ kazusy obejmują też elementy prawa procesowego. W pierwszym rozdziale omówiono kluczowe zagadnienia prawa spadkowego, takie jak: dziedziczenie ustawowe, testamentowe, niegodność dziedziczenia, zrzeczenie się dziedziczenia, zachowek, zapis windykacyjny, polecenie, stwierdzenie nabycia spadku, akt poświadczenia dziedziczenia i dział spadku. Drugi rozdział skupia się na problematyce prawa rodzinnego i opiekuńczego – m.in. małżeństwie, domniemaniu ojcostwa, rozwodzie, separacji, władzy rodzicielskiej, kontaktach z dzieckiem, alimentach i przysposobieniu. Książka jest przeznaczona dla studentów studiów prawniczych i aplikantów adwokackich, radcowskich i sądowych. Może być ona także pomocna dla dydaktyków prowadzących zajęcia z zakresu prawa cywilnego. - 2026-04
Hypocrisy moderates self-interest bias in moral character judgments
Self-interest bias describes an observer’s tendency to judge moral transgression leniently when they benefit from it. However, what factors moderate the self-interest bias is an open empirical question. Here, we investigated to what extent hypocrisy moderates the self-interest bias. Preregistered Study 1a (N = 194) and replication in Study 1b (N = 193) demonstrated that observers’ interest impacts moral character judgments of hypocritical transgressors. This effect was explained by observers’ goal attainment due to transgression (Study 2, N = 713) and agreement to aid observers’ or ingroup interests (Study 3, N = 634). Importantly, transgressors’ hypocrisy moderated the impact of observers’ interests in moral character judgments (Studies 2 & 3). In summary, when judging hypocritical transgressors, peoples’ moral character judgments tend to be biased by their or their group’s interests. However, in comparison to non-hypocritical transgressors, this impact is less pronounced. - 2026-04-14
Modification of media’s visual identity as a response to the war in Ukraine. An exploratory study
We examine how European media responded to the Russian invasion of Ukraine through visual identity changes. Using visual discourse and communication theories, we analysed 76 logo modifications in six countries: Finland, Germany, Poland, Romania, Slovakia, and the Netherlands. A cross-national comparison revealed significant differences in the scale, type, and duration of changes. Media in former Eastern Bloc countries showed the strongest visual solidarity, while Northern and Western European media used more restrained strategies, reflecting different historical contexts. Modifications included Ukrainian colours, solidarity slogans, and design adjustments. Though mostly temporary, these symbolic actions turned branding into civic engagement and reinforced shared values. This study contributes to media research by framing logo changes as visual discourse and symbolic communication in times of conflict. - 2026-04-20
Beyond WEIRD societies: Global social identifications across 45 countries and their socio- cultural and economic predictors
In an increasingly globalized world challenged by multiple social problems, global social identifications (GSIs, e.g., with all humanity) are concepts of growing interest. Although such identifications can be affected by the cultural contexts in which they are manifested, research on them remains largely confined to Western, Educated, Industrialized, Rich, Democratic (WEIRD) societies. Using data collected in 45 countries (N = 9807, preregistered), we compared the strength of three types of GSIs between countries and cultural clusters, and explored the possible role of five cultural dimensions. The results revealed relatively small cross-national differences in GSIs overall, but African and South-East Asian cultural clusters reported significantly stronger identifications than those from other regions, with India, South Africa, and Ghana scoring the highest. Contrary to our hypotheses, GSIs were positively associated with in-group collectivism, survival values, and traditional values, while institutional collectivism was unrelated. As expected, humane orientation was positively related to most GSIs. Additional exploratory analyses showed higher GSIs in countries with a lower quality of life (broadly understood). GSIs were also more pronounced in less globalized, younger societies, with a higher proportion of men, fewer immigrants, and stronger diversity. Our study highlights the need to broaden research on GSIs beyond WEIRD contexts.
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- 2024-05-24
Psychologia społeczna. Wydanie drugie zaktualizowane
Nowa wersja podręcznika Psychologia społeczna ukazuje się w 14 lat po jego pierwszej edycji. Później było wiele wydań, bo podręcznik zyskał powszechne uznanie wykładowców i studentów. To wydanie jednak zasadniczo różni się od poprzednich. Współautorem został Tomasz Grzyb. W tomie przybyło wiele nowych fragmentów, niektóre kwestie zaktualizowano bądź opatrzono dodatkowymi komentarzami, odwołując się do świeżej literatury. Przede wszystkim zmienił się świat dookoła nas, pojawiły się nowe zjawiska, jak na przykład światowa pandemia COVID-19 i wraz z tym potrzeba odniesienia się do jej psychologicznych konsekwencji, a o wielu zjawiskach, którymi zajmuje się psychologia społeczna wiemy dziś więcej niż kilkanaście lat temu. Nie pozostało to bez wpływu na sam podręcznik – jego nowa, zmodyfikowana i przeredagowana treść lepiej oddaje charakter zmieniającej się, choć ciągle tak samo fascynującej dziedziny, jaką jest psychologia społeczna. Profesorowie Bogdan Wojciszke i Tomasz Grzyb, psychologowie o światowej renomie, napisali podręcznik do psychologii społecznej, jakiego jeszcze w Polsce nie było. Książka obejmuje wszystkie klasyczne zagadnienia składające się na tę dyscyplinę oraz zagadnienia relatywnie nowe, takie jak kwestie różnic płci, nowych mediów, społeczeństwa sieci, miłości i władzy. Napisana jasnym i barwnym językiem skupia się na prawidłowościach rządzących ludzką psychiką i postępowaniem. Pokazuje, w jak fascynujący sposób psychologia społeczna odpowiada na pytanie, kim jest człowiek i na czym polega jego społeczna natura. Wcześniejsze wydania tej książki stały się fundamentem dydaktyki akademickiej na kierunku psychologia. - 2025-08-11
What Puppygirls Know? The (in)Human Pedagogy of a Trans Feminine Style
‘Puppygirls’ is a name for a particular kinky trans feminine lesbian style, rooted in the long history of trans erotic productions, and currently thriving on social media platforms, such as Twitter (now X), Bluesky, or Discord. In this article, I provide an analysis of the style that is rooted in personal immersion in ‘puppygirl culture’. Using several examples of puppygirl media productions, I argue for the possibility of reading the puppygirl style as a critical practice: one that hints at ways of being trans that do rely on the ciscentric understanding of ‘the human’ as their point of reference. In doing so, I show how puppygirl style resonates with theoretical interventions in the field of trans studies offered by scholars such as Susan Stryker and Talia Mae Bettcher. - 2023
Wypalenie rodzicielskie: wprowadzenie do teorii i badań
The aim of the article is to present the concept of parental burnout, which has recently become a topic of interest for researchers. In the article, we review the theoretical concept of parental burnout, present the questionnaires to measure it as well as the research results indicating risk factors and consequences of parental burnout, and the first studies on the effectiveness of psychological interventions to reduce it. This article presents information in a concise, simple and understandable way, providing readers with a quick overview of the theory of parental burnout and the latest research on this phenomenon. - 2024-06
The Big Three Perfectionism Scale: Validation of the Polish Version
The Big Three Perfectionism Scale (BTPS) was created to integrate different aspects of perfectionism, including the newly conceptualized concept of narcissistic perfectionism. The goal of our two studies (N = 1341) was to examine the psychometric properties of the Polish adaptation of the BTPS, supporting the validity and portability of the measure. The studies were conducted among people who had a child, thus contributing to a better understanding of parental perfectionism, one of the key factors influencing parental well-being and a child’s functioning. Our analyses included investigating the structure of the scale, intercorrelations between subscales, reliability, and convergent validity by correlating BTPS scores with other measures of perfectionism and correlates of psychopathology (borderline symptoms) and parental difficulties (parental stress and parental burnout). Results supported the structure of the original BTPS. As predicted, confirmatory factor analysis indicated that items comprising the Polish adaptation of the questionnaire, like the original version, measure three related but specific aspects of perfectionism: rigid perfectionism, self-critical perfectionism, and narcissistic perfectionism. The three dimensions were also found to be specifically related to the difficulties experienced by parents. Further, the Polish version of the BTPS was found to have good internal reliability and validity. Our results from two independent Polish samples suggest that the Polish version of the BTPS is a psychometrically robust measure of perfectionism for assessing the three perfectionism factors.