Supervisors from Institute of Psychology




My main area of interest is positive cross-cultural psychology. I already run two extensive cross-cultural studies covering data collection in several dozen countries: the first study explored cultural differences in smile perception; in the second study, we researched family happiness across cultures. For the years 2020-2024, I plan the third extensive cross-cultural investigation – into well-being and societal development. Sometimes, I carry out smaller studies, e.g., on emotions, gender equality, or humor.

Since 2012, I am an assistant professor at the Institute of Psychology (where I also received my Ph.D.). From 2017 to 2019, I worked at the Kokoro Research Center at Kyoto University in Japan. I love Japan.

Research interests

Positive cross-cultural psychology, well-being, societal development, emotions, gender issues.

Major publications:

Krys, K., Uchida, Y., Oishi, S., & Diener, E. (2019). Open society fosters satisfaction: Explanation to why individualism associates with country-level measures of satisfaction. The Journal of Positive Psychology, 14, 768-778. /17439760.2018.1557243.

Krys, K., Capaldi, C. A., Lun, V. M.-C., Vauclair, C.-M., Bond, M. H., Dominguez-Espinosa, A., & Uchida, Y. (2019). Psychologizing indexes of societal progress: Accounting for cultural diversity in preferred developmental pathways. Culture & Psychology. Advance Online Publication.

Krys, K., Capaldi, C., van Tilburg, W., Lipp, O., Bond, M., Vauclair, M., Manickam, S., Dominguez-Espinosa, A., Torres, C., Lun, V., Teyssier, J., Miles, L., Hansen, K., Szarota, P., Yu, A. A., Xing, C., Wise, R., Wagner, W., Sun, Ch., Siddiqui, R., Salem, R., Rizwan, M., Pavlopoulos, V., Park, J., Nader, M., Maricchiolo, F., Malbran, M., Javangwe, G., Işık, I, Igbokwe, D., Hur, T., Hassan, A., Gonzalez, A., Fülöp, M., Denoux, P., Cenko, E., Chkhaidze, A., Burtceva, E., Antalíková, R., & Ahmed, R. (2018). Catching up with wonderful women: The women-are-wonderful effect is smaller in more gender-egalitarian societies. International Journal of Psychology, 53, 21-26.

Krys, K., Vauclair, C.-M., Capaldi, C. A., Lun, V. M.-C., Bond, M. H., Domínguez-Espinosa, A., Torres, C., Lipp, O. V., Manickam, L. S. S., Xing, C., Antalíková, R., Pavlopoulos, V., Teyssier, J., Hur, T., Hansen, K., Szarota, P., Ahmed, R. A., Burtceva, E., Chkhaidze, A., Cenko, E., Denoux, P., Fülöp, M., Hassan, A., Igbokwe, D. O., Işık, İ., Javangwe, G., Malbran, M., Maricchiolo, F., Mikarsa, H., Miles, L. K., Nader, M., Park, J., Rizwan, M., Salem, R., Schwarz, B., Shah, I., Sun, C., Tilburg, W., Wagner, W., Wise, R, & Yu, A. A. (2016). Be careful where you smile: Culture shapes judgments of intelligence and honesty of smiling individuals. Journal of Nonverbal Behavior, 40, 101-116.

Special Issue of the Journal of Cross-Cultural Psychology that I am guest-editing:

Krys, K., Uchida, Y, & Domínguez-Espinosa, A. (2019). Call for Papers to Special Issue on “Bridging (cross-)cultural psychology with societal development studies: Discussion on the idea of cultural sensitivity in conceptualizing and measuring societal development”. Journal of Cross-Cultural Psychology.


Every single day millions of people struggle with addiction. Those who break the cycle and free themselves from addiction are able to open up to a fuller life, and the ripple effect of being clean can have a tremendous positive impact on others. Professor Mateusz Gola combines clinical practice with computational neuroscience to develop novel and effective methods of behavioral addiction treatment and preventing relapses after addiction treatment. He directs Clinical Neuroscience Lab at the Institute of Psychology, Polish Academy of Sciences and Research and Development department at PredictWatch company developing AI-supported wearable technologies for relapse prediction and prevention in substance and behavioral addiction. His dream is to help millions of people stay sober and enjoy life to the fullest. He graduated in Psychology at SWPS University of Social Sciences and Humanities, completed post-doctoral in Computational Neuroscience at the Institute for Computational Neuroscience at the University of California San Diego, and Clinical Neuroscience at Yale School of Medicine. He has created and directed an international research program on compulsive sexual behavior disorder (CSBD) resulted in over 50 recognized publications and the inclusion of CSBD as a new diagnostic entity into the WHO’s 11th edition of the International Classification of Disorders (ICD-11).

Research interests:

Addiction Treatment, Behavioral Addiction, Compulsive Sexual Behaviors, Problematic Pornography Use, Cognitive Neuroscience.

Major publications:

Gola, M., Wordecha, M., Sescousse, G., Lew-Starowicz, M., Kossowski, B., Wypych, M., ... & Marchewka, A. (2017). Can pornography be addictive? An fMRI study of men seeking treatment for problematic pornography use. Neuropsychopharmacology42(10), 2021-2031.

Potenza, M. N., Gola, M., Voon, V., Kor, A., & Kraus, S. W. (2017). Is excessive sexual behaviour an addictive disorder?. The Lancet Psychiatry4(9), 663-664.

Gola, M., Lewczuk, K., & Skorko, M. (2016). What matters: Quantity or quality of pornography use? Psychological and behavioral factors of seeking treatment for problematic pornography use. The journal of sexual medicine13(5), 815-824.

Gola, M., & Potenza, M. N. (2016). Paroxetine treatment of problematic pornography use: A case series. Journal of behavioral addictions5(3), 529-532.

Gola, M., Magnuski, M., Szumska, I., & Wróbel, A. (2013). EEG beta-band activity is related to attention and attentional deficits in the visual performance of elderly subjects. International Journal of Psychophysiology89(3), 334-341. 



My primary research interests are broad social identifications (in particular identification with all humanity, IWAH). I have researched the concept of identification with all humanity for few years. My research program has focused chiefly on identification with all humanity measured as a stable individual characteristic, its antecedents, and social consequences. I have led an international project in this area. Future 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), and the influence of COVID-19 pandemic on emotions, attitudes, and behaviors. 

Since 2020, I am an Associate Professor at the Institute of Psychology (where I also received my Ph.D.). 

I am the head of an international lab researching global human identity issues. See more at  

I was a Visiting Professor at Western Kentucky University (USA), Talca University (Chile), and Universidad Católica del Norte (Chile). I am a 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). 

Research interests

Identification with all humanity, broad social identifications, humanitarian measures, intergroup forgiveness, human rights, prosocial attitudes and behaviors, prejudice, dehumanization; 
criteria of including others into own national group; attitudes toward religious symbols 

the influence of COVID-19 pandemic on emotions, attitudes, and behaviors. 

Major publications: 

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. 

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 Research54, 28-72. 

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 Intergroup Relations79, 121-134.  

Hamer, K., McFarland, S., & Penczek, M. (2019). What lies beneath? Predictors of Identification with All Humanity. Personality and Individual Differences, 141. 258-267. 

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. 

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. 

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.



I am happy to work with applicants who would like to examine the topics related to: clinical psychology, prevention of mental disorders, evaluation of clinical diagnosis, therapy, everyday functioning of people with emotional disorders, interpersonal dynamics in couples.

In my research, I have so far used methodologies of eye-tracking, EEG, EKG, GSR, diaries, interviews, questionnaires and recently I am interested in applying machine learning to solve problems in clinical psychology. Prospectively, I would like to extend my research topics to managing conflicts in couple’s life and therapy.

I received my PhD in psychology at Jagiellonian University, Cracow in 2017. I am also a trained psychotherapist practicing in the integrative approach. I have graduated with two Master Degrees: in Psychology and English Philology from Jagiellonian University.

I have been a principal investigator, a co-author and executor of several projects funded by National Science Centre, Foundation for Polish Science, Ministry of Science and Higher Education in Poland, Institute of Psychology PAN, EEA Grants, SET programe of Jagiellonian University.

During the years of 2017-2020, I was a PA of the project conducted in the Department of Psychiatry at Oxford University, UK, examining whether depression is a homogenous disorder. In the year of 2015, I worked at University of California, Berkeley, USA on the project concerning application of cognitive-behavioral therapy in treatment of depression. In 2016, I was examining attention biases in depression and effectiveness of cognitive trainings in alleviating depression symptoms at College of William and Mary, Williamsburg, USA. I am currently a PA of the grant evaluating how deaf children perceive text and acquire language.


Research interests:

Psychopathology, depression, emotional disorders, therapeutic interventions, clinical diagnosis, couple’s dynamics


Major publications:

Holas, P., Krejtz, I., Wisiecka, K., Rusanowska, M., & Nezlek, J. B. (2020). Modification of Attentional Bias to Emotional Faces Following Mindfulness-Based Cognitive Therapy in People with a Current Depression. Mindfulness, 11(6), 1413–1423.

Krejtz, I., Rohnka N., Holas, P., Rusanowska, M., & Nezlek, J. B. (2020). Manifestations of clinical depression in daily life: a daily diary study of descriptions of naturally occurring events, Cognition and Emotion, 34 (8), 1664-1675.

Szumska, I., Gola, M., Rusanowska, M., Krajewska, M., Żygierewicz, J., Krejtz, I., … Holas, P. (2020). Mindfulness-based cognitive therapy reduces clinical symptoms, but do not change frontal alpha asymmetry in people with major depression disorder. International Journal of Neuroscience, 1–9.

Holas, P., Krejtz, I., Rusanowska, M., Rohnka, N., & Nezlek, J. B. (2018). Attention to negative words predicts daily rumination among people with clinical depression: evidence from an eye tracking and daily diary study. Cognition and Emotion, 33(6), 1277–1283.

Nezlek, J. B., Krejtz, I., Rusanowska, M., & Holas, P. (2018). Within-Person Relationships Among Daily Gratitude, Well-Being, Stress, and Positive Experiences. Journal of Happiness Studies, 20(3), 883–898.

Krejtz, I., Holas, P., Rusanowska, M., & Nezlek, J. B. (2018). Positive online attentional training as a means of modifying attentional and interpretational biases among the clinically depressed: An experimental study using eye tracking. Journal of Clinical Psychology, 74(9), 1594–1606.

Nezlek, J. B., Rusanowska, M., Holas, P., & Krejtz, I. (2017). Positive daily experiences can buffer the negative effects of daily stress: A conceptual replication. Journal of Research in Personality, 71, 67–71.