Short description
Ph.D., social and political psychologist, Associate Professor at the Institute of Psychology of Polish Academy of Sciences, Warsaw, Poland
Places of work
Associate Professor at the Institute of Psychology, Polish Academy of Sciences (Warsaw, Poland).
Visiting Professor at Western Kentucky University (USA), Talca University (Chile), Universidad Católica del Norte (Chile), and Instituto Universitário de Lisboa Escola de Ciências Sociais e Humanas (ISCTE-IUL, Portugal).
Guest Editor of the Research Topic in Frontiers in Psychology: Global Human Identification: Studies of Its Roots, How It May Be Enlarged, and Its Expressions in Attitudes and Behavior
Member of the International Society of Political Psychology (ISPP), European Association of Social Psychology (EASP), International Association of Cross-Cultural Psychology (IACCP), Society for Personality and Social Psychology (SPSP), and Polish Association of Social Psychology (PSPS).
Member of the Board of the Foundation for the Development of Polish Psychology (Fundacja na rzecz Rozwoju Polskiej Psychologii im. Tadeusza Tomaszewskiego).
Graduated in psychology at the University of Warsaw. Received her Ph.D. and habilitation in psychology at the Institute of Psychology, Polish Academy of Sciences (Warsaw, Poland).
Summary of research
Identification with all humanity, broad social identifications,
humanitarian measures, intergroup forgiveness, human rights, prosocial attitudes and behaviors,
prejudice, dehumanization, hate crimes;
criteria of including others into own national group;
attitudes toward religious symbols;
conspiracy theories, the influence of COVID-19 pandemic on emotions, attitudes, and behaviors;
Big Two.
Research interests
My primary research interests are predictors and social consequences of broad social identifications (in particular identification with all humanity); I led an international project in this area.
I have researched the concept of identification with all humanity for few years. My research program has mostly focused on identification with all humanity (IWAH) measured as a stable individual characteristic, its antecedents, and social consequences. Ongoing projects will broaden this topic with research on situationally activated global human and citizenship identities.
My other interests include criteria of including others into own national group (criteria of "belonging" to a national group) in a cross-cultural context, attitudes toward religious symbols in public space, understanding of ambiguous group terms by laypeople (e.g. an “ethnic group” concept), conspiracy theories, and the influence of COVID-19 pandemic on emotions, attitudes, and behaviors.
Publications
Selected publications:
2023
Hackett, J., & Hamer, K. (2023). Editorial: Global human identification: studies of its roots, how it may be enlarged, and its expressions in attitudes and behavior. Frontiers in Psychology, 14:1253525. https://doi.org/10.3389/fpsyg.2023.1253525
Hamer K. & McFarland, S. (2023). The role of early intergroup experiences for identification with all humanity in adulthood. Frontiers in Psychology. 14:1042602. https://doi.org/10.3389/fpsyg.2023.1042602
Kaniasty K, Baran M, Urbańska B, Boczkowska M, Hamer K. (2023). Sense of danger, sense of country's mastery, and sense of personal mastery as concomitants of psychological distress and subjective well-being in a sample of Poles following Russia's invasion of Ukraine: Prospective analyses. Appl Psychol Health Well Being. https://doi.org/10.1111/aphw.12483. Epub ahead of print. PMID: 37640052.
McFarland, S., Hamer K. & Hackett, J. eds. (2023). Global human identification: Studies of its roots, how it may be enlarged, and its expressions in attitudes and behavior. Lausanne: Frontiers Media SA. doi:10.3389/978-2-8325-2782-5
2022
Hamer, K., López Pérez, D., Drogosz, M. & Goworek, H. (2022). The dynamics of dyadic interactions between people of different ethnicities depend on their identification with all humanity. Scientific Reports.12, 21671 http://dx.doi.org/10.1038/s41598-022-25905-9
Feng, Y., Warmenhoven, H., Wilson, A., Jin, Y., Chen, R., Wang, Y., Hamer, K. (2022). The Identification With All Humanity (IWAH) scale: its psychometric properties and associations with help-seeking during COVID-19. Current Psychology. Online first. https://doi.org/10.1007/s12144-022-03607-9
Marchlewska, M., Hamer, K., Baran, M., Górska, P., & Kaniasty, K. (2022). COVID-19: Why Do People Refuse Vaccination? The Role of Social Identities and Conspiracy Beliefs: Evidence from Nationwide Samples of Polish Adults. Vaccines, 10(2), 268. https://doi.org/10.3390/vaccines10020268
2021
Baran, M., & Hamer, K. (2021). Młodzi dorośli podczas pandemii Covid-19. [Young adults during COVID-19 pandemic] In: Skarżyńska, K. (ed.). Młodzi dorośli : identyfikacje, postawy, aktywizm i problemy życiowe [Young adults: their identifications, attitudes, activism, and life problems] (pp. 99-123). Warszawa: Instytut Problemów Współczesnej Cywilizacji im Marka Dietricha.
Baran, M., Hamer, K., Marchlewska, M., Baran, T., & Kaniasty, K. (2021). Gotowość do pomagania i udzielanie pomocy w pandemii COVID-19: rola orientacji politycznych. [Readiness to help and giving help in the COVID-19 pandemic – the role of political orientations] In: M. Kaczmarek-Śliwińska (ed.) Medialno-społeczny obraz Covid-19: Solidarność czy polaryzacja – Podsumowanie, diagnoza, rekomendacje [The media and social image of Covid-19: Solidarity or Polarization - Summary, diagnosis, recommendations ] (pp. 11-43). Warszawa: Wydawnictwo SBP.
Bertin, P., Nera, K., Hamer, K., Uhl-Haedicke, I., & Delouvée, S. (2021). Stand out of my Sunlight: The Mediating Role of Climate Change Conspiracy Beliefs in a Relationship between National Collective Narcissism and Climate Science Rejection. Group Processes and Intergroup Relations.24(5), 738-758. https://doi.org/10.1177/1368430221992114
Greszta, E., Świderska, J., Zalewska-Łunkiewicz, K., Obidziński, M., Ryś, M., Hamer, K. (2021). Gender differences in patient-perceived changes to the system of values after a cancer diagnosis, Patient Education and Counseling. https://doi.org/10.1016/j.pec.2021.07.007
Hamer, K. (2021). Identyfikacje społeczne młodych Polaków oraz uznawane przez nich kryteria polskości i fundamenty moralne. [Social identifications of young Poles, their criteria of being a Pole and their moral foundations]. In: Skarżyńska, K. (ed.). Młodzi dorośli: identyfikacje, postawy, aktywizm i problemy życiowe [Young adults: their identifications, attitudes, activism, and life problems] (pp. 17-34). Warszawa: Instytut Problemów Współczesnej Cywilizacji im Marka Dietricha.
Hamer, K., Baran, M., Marchlewska, M. & Kaniasty, K (2021). Zmiany w identyfikacjach społecznych, myśleniu spiskowym, obawach, dorastanie i zachowaniach Polaków podczas pierwszej fali pandemii COVID-19. [Changes in social identifications, conspiracy thinking, fears, well-being and behaviors of Poles during the first wave of the COVID-19 pandemic]. In J. Paluchowski, L. Bakiera (eds.). Psychospołeczny obraz pierwszej fali pandemii COVID-19 w Polsce. [Psychosocial image of a first wave of COVID-19 pandemic in Poland]. (pp. 125-143 ). Poznan: Wydawnictwo Naukowe UAM. DOI:10.14746/amup.9788323239956
Hamer, K., Penczek, M., McFarland, S., Włodarczyk, A., Łużniak-Piecha, M., Golińska, A., Manrique Cadena, L., Ibarra, M., Bertin, P., Delouvée, S. (2021). Identification With All Humanity - a test of the factorial structure and measurement invariance of the scale in five countries. International Journal of Psychology. 56 (1), 157-174. https://doi.org/10.1002/ijop.12678
2020
Hamer, K., McFarland, S., Czarnecka, B., Golińska, A., Manrique Cadena, L., Łużniak-Piecha, M., & Jułkowski, T. (2020). What is an "ethnic group" in ordinary people’s eyes? Different ways of understanding it among American, British, Mexican, and Polish respondents. Cross-Cultural Research, 54, 28-72. https://doi.org/10.1177/1069397118816939
Sparkman, D., & Hamer, K. (2020). Seeing the Human in Everyone: Multicultural Experiences Predict More Positive Intergroup Attitudes and Humanitarian Helping through Identification with All Humanity. International Journal of Intercultural Relations. 79, 121-134. https://doi.org/10.1016/j.ijintrel.2020.08.007
2019
Hamer, K., McFarland, S., & Penczek, M. (2019). What lies beneath? Predictors of Identification with All Humanity. Personality and Individual Differences, 141. 258-267. https://doi.org/10.1016/j.paid.2018.12.019
McFarland, S., Hackett, J., Hamer, K., Katzarska-Miller, I., Malsch, A., Reese, G., Reysen, S. (2019). Global Human Identification and Citizenship: A Review of Psychological Studies. Political Psychology, 6, 141-171. https://doi.org/10.1111/pops.12572
2018
Hamer, K., Penczek, M., & Bilewicz, M. (2018). Between universalistic and defensive forms of group attachment. The indirect effects of national identification on intergroup forgiveness. Personality and Individual Differences, 131, 15-20. https://doi.org/10.1016/j.paid.2018.03.052
2017
Hamer, K., Penczek, M., & Bilewicz, M. (2017). "Humanum ignoscere est”. The relationships of national and supranational identifications with intergroup forgiveness. Personality and Individual Differences, 105, 257-263. https://doi.org/10.1016/j.paid.2016.09.058
Hamer, K., McFarland, S., Łużniak-Piecha, M., & Golińska, A. (2017). Multiple social identifications and their relation to life satisfaction, physical well-being, and feeling of discrimination in the cross-cultural context. Fides et Ratio, 4(32)2017, 396-419.
2016
Hamer, K., & Penczek, M. (2016). Wybaczenie międzygrupowe a szerokie identyfikacje społeczne [Intergroup forgiveness and broad social identifications]. Fides et Ratio, 2, 112-127.
Łużniak-Piecha, M., Hamer, K., Manrique Cadena, L., Golińska, A., & McFarland, S. (2016). Cross-cultural research project management. When scientists are becoming international project managers. Studia Społeczne [Social Studies], 15(2), 13-21.
McFarland, S., & Hamer, K. (2016). Rafał Lemkin: jak ludobójstwo zostało uznane za zbrodnię [Raphael Lemkin: how genocide became a crime]. Civitas et Lex. 69-85.
2013
Radkiewicz, P., Skarżyńska, K., & Hamer, K. (2013). The influence of the Big Two: The perception of people in relation to negativistic beliefs about the social world. Social Psychology, 44, 75-83. http://dx.doi.org/10.1027/1864-9335/a000146
2012
Hamer, K. (2012). Identyfikacje społeczne a płeć biologiczna i psychologiczna [Social identifications, gender and biological sex]. In: A. Chybicka, N. Kosakowska-Berezecka, & P. Pawlicka (esd.). Podróże między kobiecością a męskością [Travels between feminity and masculinity] (17-38). Kraków: Impuls.
selected earlier publications:
Hamer, K., & Gutowski, J. (2009). Identification with all humanity in Poland and its behavioral consequences. In S. Scuzzarello, C. Kinnvall, & K. Monroe (Eds.). On behalf of others: The psychology of care in a global world (pp. 163–183). New York, NY, US: Oxford University Press. https://doi.org/10.1093/acprof:oso/9780195385557.003.0009
Conference & presentations
Selected conferences and presentations (by year):
Gkinopoulos, T. Hamer, K., Marcinkowska, K. Wlodarczyk, A., Tam, K.-P., Pong, V., Igbokwe, D. (2023). All humanity or citizens of the world? Similarities and differences in describing different labels used in global social identities concepts. 19. General Meeting of the European Association of Social Psychology (EASP), Kraków, Poland.
Hamer, K., López Pérez, D., Drogosz, M. & Goworek, H. (2023). Identification with all humanity and the dynamics of diadic interactions between people of different ethnicities.19. General Meeting of the European Association of Social Psychology (EASP), Kraków, Poland.
Hackett, J., Hamer, K., Penczek M., Marcinkowska K., Bertin P., Carmona M., Loy L., Sparkman D., Wlodarczyk A., Akello G., Benningstad N., Bierwiaczonek K., Enea V., Espinoza A., Gkinopoulos T., Guerra R., Hofhuis J., Kaniasty K., Pešout O., Spence A., Stöckli S. (2023). Global identification and human rights: The impact of political orientation and cultural change. Regional meeting of the International Association for Cross-Cultural Psychology (IACCP), Limerick, Ireland.
Hamer, K. et al. (2023). Global identifications in cultural clusters. Regional meeting of the International Association for Cross-Cultural Psychology (IACCP), Limerick, Ireland.
Marcinkowska, K., Hamer, K. et al. (2023). Similarities and differences in describing various global identity labels in 13 countries. Regional meeting of the International Association for Cross-Cultural Psychology (IACCP), Limerick, Ireland.
Penczek, M., Hamer, K., Marcinkowska K., Bertin P., Carmona M., Loy L., Sparkman D., Wlodarczyk A., Baran M. (2023). How cultures impact the connection between global identifications and prosocial attitudes. Regional meeting of the International Association for Cross-Cultural Psychology (IACCP), Limerick, Ireland.
Hamer, K. (2022). Sam McFarland: In Memoriam. Annual meeting of the International Society of Political Psychology Athens, Greece.
Hamer, K., Baran, M. (2022). During the COVID-19 Pandemic, Who is Concerned about Global Issues beyond the Spread of Diseases? Annual meeting of the International Society of Political Psychology Athens, Greece.
Hamer, K., McFarland, S. (2021). Can early experiences enlarge Global Human Identification? (virtual) International Congress of Psychology (ICP), Prague, Czech Republic.
Hamer, K., McFarland, S. (2021). Identification with all humanity as a predictor of blatant dehumanization and intergroup forgiveness, 43. Annual Scientific Meeting (virtual) of the International Society of Political Psychology (ISPP), Montreal, Canada.
Sparkman, D., & Hamer, K. (2020). Multicultural Experiences Hinder Negative Attitudes and Enhance Helping through Identification with All Humanity. 42. Annual Scientific Meeting (virtual) of the International Society of Political Psychology (ISPP), Berlin, Germany.
Hamer, K., McFarland, S., Penczek, M. (2019). What lies beneath? Predictors of identification with all humanity. 42. Annual Scientific Meeting of the International Society of Political Psychology (ISPP), Lisbon, Portugal.
Hamer, K., Paterson, J., Drogosz, M., McFarland, S., (2019). Psychological determinants of outgroup reactions to hate crimes: the role of collective narcissism and human identification. 42. Annual Scientific Meeting of the International Society of Political Psychology (ISPP), Lisbon, Portugal.
Hamer, K., McFarland, S., Włodarczyk, A., Łużniak-Piecha, M., Golinska, A., Cadena L.M., & Ibarra Espinosa, M. (2018). Identification with all humanity in connection with global concern, protection of human rights and prosocial activities toward people from different countries - a study in the US, Mexico, Chile and Poland. 24. Congress of the International Association of Cross-Cultural Psychology (IACCP), Guelph, Canada.
Hamer, K., Jułkowski, T., Łużniak-Piecha, M., Manrique Cadena, L., Golińska, A., Czarnecka, B., McFarland, S. (2018). What is ‘Ethnic Group’? Different Ways of Understanding it among U.S., U.K., Polish, and Mexican Students. 24. Congress of the International Association of Cross-Cultural Psychology (IACCP), Guelph, Canada.
Penczek, M., Hamer, K., McFarland, S., Włodarczyk, A., Łużniak-Piecha, M., Golińska, A., Cadena L.M., & Ibarra Espinosa, M. (2018), Is human identification universal? Cross-cultural equivalence of the Identification With All Humanity scale; 24. Congress of the International Association of Cross-Cultural Psychology (IACCP), Guelph, Canada.
Hamer, K., McFarland, S., Włodarczyk, A., Łużniak-Piecha, M., Hamer, H., Gasparski, P., (2018). Identification with all humanity and prosocial activities toward people from different countries - a study in Poland, Chile and the US. International conference "Between narcissism and entitlement: Self-enhancement in a cross-cultural perspective”, Warsaw, Poland.
Hamer, K., Jułkowski, T., Łużniak-Piecha, M., Manrique Cadena, L., Golińska, A., Czarnecka, B., McFarland, S. (2017). What is an ‘ethnic group’? Different ways of understanding it among American, British, Mexican and Polish students - a cross-cultural research project. 9. International Association for Cross-Cultural Psychology (IACCP) European Congress, Warsaw, Poland.
Hamer, K., Drogosz, M., McFarland,S., Manrique Cadena, L., Golińska, A., Kruszewski, K. , Piven, S., Łużniak-Piecha, M., Penczek, M. (2017). The role of human identification in automatic and controlled processes of prejudice and dehumanization. 40. Annual Scientific Meeting of the International Society of Political Psychology (ISPP), Edinburg, UK.
Hamer, K. (2017). How can we enlarge the sense that all humanity is one family? 40. Annual Scientific Meeting of the International Society of Political Psychology (ISPP), Edinburg, UK.
Hamer, K., Drogosz, M. (2017). Faces of Races: Automatic Dehumanization and its connection to Identification with All Humanity (poster). 18. General Meeting of the European Association of Social Psychology (EASP), Granada, Spain.
Hamer, K., Penczek, M., McFarland, S., Bilewicz, M. (2017). Let’s forgive them: the relationship of national and supranational identifications with intergroup forgiveness. Conference of the International Society for the Study of Individual Differences (ISSID), Warsaw, Poland.
Hamer, K., McFarland, S., Łużniak-Piecha, M., Czarnecka, B., Manrique Cadena, L., Golińska, A. (2016). Criteria of belonging to national group from American, British and Polish perspective – cross-cultural research. 39. Annual Scientific Meeting of the International Society of Political Psychology (ISPP), Warsaw, Poland.
Hamer, K. (2016). Attitudes towards religious symbols in public places and their psychological predictors. 39. Annual Scientific Meeting of the International Society of Political Psychology (ISPP), Warsaw, Poland.
Hamer, K., McFarland, S., Łużniak-Piecha, M., Golińska, A. (2016). Satisfaction with life, feelings of discrimination, and their connection to social identifications. 39. Annual Scientific Meeting of the International Society of Political Psychology (ISPP), Warsaw, Poland.
Hamer, K., Bilewicz, M. (2016). Support towards religious symbols in public space and its predictors. 31. International Congress of Psychology (ICP), Yokohama, Japan.
Hamer, K., Łużniak-Piecha, M., McFarland, S., Czarnecka, B. (2016). Criteria for belonging to a national group according to Americans, Britons and Poles: differences and similarities. 31. International Congress of Psychology (ICP), Yokohama, Japan.
Hamer, K., Penczek, M., Bilewicz, M. (2014). Mutual relationship of national and supranational identifications with forgiveness: lights and shades of national identification. 37. Annual Scientific Meeting of International Society of Political Psychology (ISPP), Rome, Italy.
Penczek, M., Hamer, K. (2014). Influence of shared identity on Perception of conciliatory actions and forgiveness toward a transgressing group, Congress of the International Association of Cross-Cultural Psychology (IACCP), Reims, France.
Hamer, K., Penczek, M., Bilewicz, M. (2013). Different aspects of national identification and common categorization with the perpetrator as predictors of intergroup forgiveness. International conference IV Tajfel Seminar “History, Reconciliation & Intergroup Relations”, Warsaw, Poland.
Hamer, K. (2012). Identification with all humanity and its predictors. 30. International Congress of Psychology, Cape Town, Republic of South Africa.
Hamer, K. (2011). Social identities and well-being in Poland. European, National and Regional Identity conference, Oradea, Romania.
Hamer, K. (2011). Volunteers and their social identities. 34. Annual Scientific Meeting of International Society of Political Psychology (ISPP), Istanbul, Turkey.
Hamer, K., (2010). Social identities and religion. 33rd Annual Scientific Meeting of International Society of Political Psychology (ISPP), San Francisco, USA.
Hamer, K. (2010). Poland in Transformation: Changes in Social Identities and Criteria of Being Polish after 1995. International conference "From the totalitarianism towards democracy in Central-Eastern Europe. Contributions of Political Psychology to Understanding of Transformation Process in the Region" (ISPP local conference). Warsaw, Poland.
Hamer, K. (2009). Changes in social identifications, religiousness and well-being in Poland during years of system transformation. 32. Annual Scientific Meeting of International Society of Political Psychology (ISPP), Dublin, Ireland.