Hirotaka Imada

Hirotaka Imada

Social Psychologist (Ph.D)

Sitemap

A list of all the posts and pages found on the site. For you robots out there is an XML version available for digesting as well.

Pages

Ingroup favoritism and outgroup derogation in intergenerational cooperation

*Imada, H., Inoue, Y., Yamamoto-Wilson, A., Saijo, T., & Mifune, N. (2025). Ingroup favoritism and outgroup derogation in intergenerational cooperation. Communications Psychology, 3(1), 89. https://doi.org/10.1038/s44271-025-00272-z

About me

Posts

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Blog Post number 4

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Blog Post number 1

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lab

portfolio

projects

Advancing Theoretical Understanding and Methodological Capacity in Psychology Through Social Simulation

Social simulations offer transferable assets, especially for early career scholars including PhD students. For instance, programming proficiency, particularly in Python, provides valuable preparation for industry careers in data science, technology, and consulting. Moreover, mastering one programming language significantly accelerates learning additional languages, creating a foundation for lifelong technical development. In addition, social simulations (agent-based simulations) are applied in a range of contexts because they can simulate the complex interactions between individuals and observe how system-level patterns emerge from their behaviours.

Echoes of Care

This exploratory project, Echoes of Care, brings together psychological science and participatory art to address climate change.

Building Intergenerational Cooperation for Renewable Energy Development

The transition to renewable energy is not only a technological challenge but also a social one. Renewable energy projects often involve competing interests among energy companies, local communities, governments, and future generations, making trust, cooperation, and effective communication essential for successful implementation. This research residency brings together psychological research on intergroup relations, cooperation, and pro-climate behaviour with the practical challenges faced by Landsvirkjun, Iceland’s national power company. The residency aims to strengthen the company’s engagement with communities while establishing a long-term knowledge exchange partnership between academia and industry to support a just and socially sustainable energy transition.

publications

Preference for anonymous giving

*Imada, H. (2020). Preference for anonymous giving. Letters on Evolutionary Behavioral Science, 11(1), 22-26. https://doi.org/10.5178/LEBS.2020.76

Alcohol consumption and group decision making

Imada, H., Hopthrow, T., & Abrams, D. (2021). Alcohol consumption and group decision making. In D. Frings and I. P. Albery (Ed.). The Handbook of Alcohol Use and Abuse: Understanding from Synapse to Society. Elsevier Academic Press. https://doi.org/10.1016/B978-0-12-816720-5.00009-8

The role of positive and negative gossip in promoting prosocial behavior

*Imada, H., Hopthrow, T., & Abrams, D. (2021). The role of positive and negative gossip in promoting prosocial behavior. Evolutionary Behavioral Sciences, 15(3), 285-291. https://doi.org/10.1037/EBS0000218

Perceptions of the appropriate response to norm violation in 57 societies

*Eriksson, K., Strimling, P., Gelfand, M., Wu, J., Abernathy, J., Akotia, C. S., Aldashev, A., Andersson, P. A., Andrighetto, G., Anum, A., Arikan, G., Aycan, Z., ... , Imada. H., ... , Van Lange, P. A. M. (2021). Perceptions of the appropriate response to norm violation in 57 societies. Nature Communications, 12(1), 1481. https://doi.org/10.1038/s41467-021-21602-9

A creative destruction approach to replication: Implicit work and sex morality across cultures

*Tierney, W., Hardy, J., Ebersole, C. R., Viganola, D., Clemente, E. G., Gordon, M., Hoogeveen, S., Haaf, J., Dreber, A., Johannesson, M., Pfeiffer, T., Huang, J. L., ... , Uhlmann, E. L. (2021). A creative destruction approach to replication: Implicit work and sex morality across cultures. Journal of Experimental Social Psychology, 93, 104060. https://doi.org/10.1016/j.jesp.2020.104060 [Member of forecasting collaboration]

Cleaning up our acts: psychological interventions to reduce engine idling and improve air quality

*Abrams, D., Lalot, F., Hopthrow, T., Templeton, A., Steeden, B., Özkeçeci, H., Imada, H., Warbis, S., Sandiford, D., Meleady, R., Fell, E., Abrams, Z., ... , Peckham, S. (2021). Cleaning up our acts: psychological interventions to reduce engine idling and improve air quality. Journal of Environmental Psychology, 74, 101587. https://doi.org/10.1016/j.jenvp.2021.101587

Intergroup discrimination in cooperation among moral and non-moral groups

*Imada, H., Codd, D., & Liu, D. (2021). Intergroup discrimination in cooperation among moral and non-moral groups. Letters on Evolutionary Behavioral Science, 12(1), 28-33. https://doi.org/10.5178/LEBS.2021.86

Pathogen threat and in-group cooperation

Imada, H., & *Mifune, N. (2021). Pathogen threat and in-group cooperation. Frontiers in Psychology, 12, 678188. https://doi.org/10.3389/fpsyg.2021.678188

Rewarding more is better for soliciting help, yet more so for cash than for goods: revisiting and reframing the tale of two markets with replications and extensions of Heyman and Ariely (2004)

†Imada, H., †Fei Chan, W., †Ki Ng, Y., †Hing Man, L., †Sze Wong, M., Ley Cheng, B., *Feldman, G., Kong, H., & Kong SAR, H. (2022). Rewarding more is better for soliciting help, yet more so for cash than for goods: revisiting and reframing the tale of two markets with replications and extensions of Heyman and Ariely (2004). Collabra: Psychology, 8(1), 32572. https://doi.org/10.1525/COLLABRA.32572 [† joint first authorship]

Beyond reciprocity: forgiveness, generosity, and punishment in continuing dyadic interactions

*Rumble, A. C., Willcox, K., Imada, H., & Yansen, D. (2022). Beyond reciprocity: forgiveness, generosity, and punishment in continuing dyadic interactions. Journal of Theoretical Social Psychology, 2022 (1), 7259257. https://doi.org/10.1155/2022/7259257

Gossip about in-group and out-group norm deviations

*Imada, H., Rullo, M., Hopthrow, T., Van de Vyver, J., & Zagefka, H. (2022). Gossip about in-group and out-group norm deviations. Comprehensive Results in Social Psychology. 6(1-3), 113-133. https://doi.org/10.1080/23743603.2022.2090327

Examining the context sensitivity of research findings from archival data

Delios, A., Clemente, E., Wu, T., Tan, H., Wang, Y., Gordon, M., Viganola, D., Chen, Z., Dreber, A., Johannesson, M., Pfeiffer, T., Generalizability Tests Forecasting Collaboration, & Uhlmann, E.L. (2022). Examining the context sensitivity of research findings from archival data. Proceedings of the National Academy of Sciences, 119(30), e2120377119. https://doi.org/10.1073/pnas.2120377119 [Member of forecasting collaboration]

Does the sense of power influence reputational concern? Tests with episodic and semantic power priming

*Imada, H., Hopthrow, T., & Zibell, H. (2023). Does the sense of power influence reputational concern? Tests with episodic and semantic power priming. Social Psychological Bulletin, 18, e7779. https://doi.org/10.32872/spb.7779

An apology With a tiny monetary compensation is no more effective than a verbal apology alone

*Imada, H., Yamamoto, A., & Tsudaka, G. (2023). An apology With a tiny monetary compensation is no more effective than a verbal apology alone. Letters on Evolutionary Behavioral Science, 14(1), 32-36. https://doi.org/10.5178/lebs.2023.106

Dynamic indirect reciprocity: when is indirect reciprocity bounded by group membership?

Imada, H., Romano, A., & *Mifune, N. (2023). Dynamic indirect reciprocity: when is indirect reciprocity bounded by group membership? Evolution and Human Behavior, 44(4), 373-383. https://doi.org/10.1016/j.evolhumbehav.2023.05.002

On the trajectory of discrimination: a meta-analysis and forecasting survey capturing 44 years of field experiments on gender and hiring decisions

*Schaerer, M., du Plessis, C., Nguyen, M. H. B., van Aert, R. C. M., Tiokhin, L., Lakens, D., Giulia Clemente, E., Pfeiffer, T., Dreber, A., Johannesson, M., Clark, Gender Audits Forecasting Collaboration, C. J., & Luis Uhlmann, E. (2023). On the trajectory of discrimination: a meta-analysis and forecasting survey capturing 44 years of field experiments on gender and hiring decisions. Organizational Behavior and Human Decision Processes, 179, 104280.https://doi.org/10.1016/j.obhdp.2023.104280 [Member of gender audits forecasting collaboration]

Cooperation and crossed categorization in a minimal group context: testing the bounded generalized reciprocity and social identity accounts

*Imada, H., Ito, A., Hopthrow, T., Abrams, D., Willcox, K., Yansen, D., & Rumble, A. (2023). Cooperation and crossed categorization in a minimal group context: testing the bounded generalized reciprocity and social identity accounts. Comprehensive Results in Social Psychology, 7(3), 111-133. https://doi.org/10.1080/23743603.2024.2388345

Experimental evidence suggests intergroup relations are, by default, neutral rather than aggressive

Imada, H., & *Mifune, N. (2024). Experimental evidence suggests intergroup relations are, by default, neutral rather than aggressive. Behavioral and Brain Sciences, 47, e13. https://doi.org/10.1017/S0140525X23002728

‘We need community’: bridging the path to distance from crime with community football

*Newson, M., Peitz, L., Gitsham, H., Imada, H., & Abrams, D. (2024). ‘We need community’: bridging the path to distance from crime with community football. Journal of Community & Applied Social Psychology, 34(1), e2757. https://doi.org/10.1002/casp.2757

Does COVID-19 threat relate to intergroup attitudes? A test in the U.K.

Imada, H., *Lalot, F., & Abrams, D. (2024). Does COVID-19 threat relate to intergroup attitudes? A test in the U.K. Evolutionary Behavioral Sciences, 18(2), 192–199. https://doi.org/10.1037/ebs0000311

Changes in social norms during the early stages of the COVID-19 pandemic across 43 countries

*Andrighetto, G., Szekely, A., Guido, A., Gelfand, M., Abernathy, J., Arikan, G., Aycan, Z., Bankar, S., Blumen, S., … Imada, H., … Eriksson, K. (2024) Changes in social norms during the early stages of the COVID-19 pandemic across 43 countries. Nature Communications, 15(1), 1436. https://doi.org/10.1038/s41467-024-44999-5

Anger and disgust shape judgments of social sanctions across cultures, especially in high individual autonomy societies

*Andersson, P. A., Vartanova, I., Vastfjall, D., Tinghog, G., Wu, J., Akoita, C. S., Aldashev, A., … Imada, H., … Eriksson, K. Anger and disgust shape judgments of social sanctions across cultures, especially in high individual autonomy societies (2024). Scientific Reports, 14(1), 5591. https://doi.org/10.1038/s41598-024-55815-x

Psychological mechanisms underlying in-group favouritism in cooperation: revisiting the reputation management and expectation hypotheses

*Imada, H., Mifune, N., Shimizu, H. Psychological mechanisms underlying in-group favouritism in cooperation: revisiting the reputation management and expectation hypotheses (2024). Group Processes & Intergroup Relations, 27(8), 1914-1930. https://doi.org/10.1177/13684302241239860

Intergroup cooperation in the United States and Japan: revisiting Yuki’s (2003) theory on the cultural difference in the conceptualization of group boundaries

*Imada, H., Tsudaka, G., Mifune, N., Mizuno, K., Schug, J., & Kusano, K. (2024). Intergroup cooperation in the United States and Japan: revisiting Yuki’s (2003) theory on the cultural difference in the conceptualization of group boundaries. Current Research in Ecological and Social Psychology, 7, 100200. https://doi.org/10.1016/j.cresp.2024.100200

Group-bounded indirect reciprocity and intergroup gossip

*Imada, H., Mifune, N., & Zibell, H. (2024). Group-bounded indirect reciprocity and intergroup gossip. Journal of Experimental Social Psychology, 115, 104657. https://doi.org/10.1016/j.jesp.2024.104657

A tale of two competing theories on ingroup favouritism

*Imada, H. (2024). A tale of two competing theories on ingroup favouritism. Nature Reviews Psychology, 3(11), 727-727. https://doi.org/10.1038/s44159-024-00371-4

In-group binding moral values and reactive behavioral immune responses

*Imada, H., Li, Y., Mifune, N., & Ohira, H. (2024). In-group binding moral values and reactive behavioral immune responses. Current Psychology, 43(46), 35471-35477. https://doi.org/10.1007/s12144-024-07023-z

The psychology of criminal authority: introducing the legitimacy of secret power scale

*Travaglino, G. A., Mirisola, A., Moon, C., Burgmer, P., Imada, H., Giammusso, I., D’Ottone, S. C., Nawata, K., Ozeki, M., & Abrams, D. (2025). The psychology of criminal authority: introducing the legitimacy of secret power scale. Group Processes and Intergroup Relations, 28(3), 477-503. https://doi.org/10.1177/13684302241290935

State responsiveness, collective efficacy, and threat perception: catalyst and complacency effects in opposition to crime across eight countries

*Moon, C., Travaglino, G. A., Mirisola, A., Burgmer, P., D’Ottone S., Giammusso, I., Imada, H., Nawata, K., & Ozeki, M. (2025). State responsiveness, collective efficacy, and threat perception: catalyst and complacency effects in opposition to crime across eight countries. British Journal of Social Psychology, 64(1), e12832. https://doi.org/10.1111/bjso.12832

Belief in a just world for the self and others, Karma, system justification, and well-being during COVID-19 pandemic: evidence from 15 Asian nations

*Chobthamkit, P., Sutton, R. M., English, A. S., Wongvorachan, T., Datu, J. A. D., Chung, K. L., Tan, CS, Imada, H., Ozkan, Z., Ashraf, F., Cayubit, R. F. O., Chaleeraktrakoon, T., … , Yusoff, A. M. (2025). Belief in a just world for the self and others, Karma, system justification, and well-being during COVID-19 pandemic: Evidence from 15 Asian nations. Asian Journal of Social Psychology, 28(1), e12667. https://doi.org/10.1111/ajsp.12667

The evaluation of negative gossipers: testing the role of group membership and social anxiety

Patton, B., & *Imada, H. (2025). The evaluation of negative gossipers: testing the role of group membership and social anxiety. Cogent Psychology, 12(1), 2489219. https://doi.org/10.1080/23311908.2025.2489219

Ingroup favoritism in cooperation in a dynamic intergroup context: data from Israeli professional volleyball players

*Imada, H., Kopilovitch, R., & Zultan, R. (2025). Ingroup favoritism in cooperation in a dynamic intergroup context: data from Israeli professional volleyball players. Judgment and Decision Making, 20, e21. https://doi.org/10.1017/jdm.2025.9

Does learning more about others impact liking them?: replication and extension Registered Report of Norton et al. (2007)’s lure of ambiguity

†Horsham, Z., †Haydock-Symonds, A., †Imada, H., Tai, H., Lau, W., Shum, T., Zeng, Y., Chow, H., & *Feldman, G. (2025). Does learning more about others impact liking them?: Replication and extension Registered Report of Norton et al. (2007)’s Lure of Ambiguity. Royal Society Open Science, 12(4), 250441. https://doi.org/10.1098/rsos.250441 [† joint first authorship]

What we think others think and do About climate change: A multicountry test of pluralistic ignorance and public-consensus messaging

*Geiger, S. J., Köhler, J. K., Delabrida, Z. N. C., Garduño-Realivazquez, K. A., Haugestad, C. A. P., Imada, H., Iyer, A., Maharja, C., Mann, D. C., Marczak, M., Melville, O., Nijssen, S. R. R., … , & White, M. P. (2025). What we think others think and do About climate change: A multicountry test of pluralistic ignorance and public-consensus messaging. Psychological Science, 36(6), 421–442. https://doi.org/10.1177/09567976251335585

I see sick people: Beliefs about sensory detection of infectious disease are largely consistent across cultures

*Ackerman, J. M., Samore, T., Fessler, D. M. T., Kupfer, T. R., Choi, S., Merrell, W. N., Aarøe, L., Aavik, T., Acabado, S., Akello, G., Alfian, I. N., Al-Shawaf, L., … , Imada, H., … , & Žeželj, I. (2025). I see sick people: Beliefs about sensory detection of infectious disease are largely consistent across cultures. Brain, Behavior, and Immunity, 128, 737–750. https://doi.org/10.1016/j.bbi.2025.04.020

When confidence in institutions backfires: power-distance orientation moderates the relationship between institutional trust and civic honesty across eight countries

*D’Ottone, S., Travaglino, G. A., Burgmer, P., Giammusso, I., Imada, H., Mao, Y., Mirisola, A., Moon, C., Nawata, K., & Ozeki, M. (2025). When confidence in institutions backfires: power-distance orientation moderates the relationship between institutional trust and civic honesty across eight countries. International Journal of Psychology, 60(4), e70059. https://doi.org/10.1002/ijop.70059

Ingroup favoritism and outgroup derogation in intergenerational cooperation

*Imada, H., Inoue, Y., Yamamoto-Wilson, A., Saijo, T., & Mifune, N. (2025). Ingroup favoritism and outgroup derogation in intergenerational cooperation. Communications Psychology, 3(1), 89. https://doi.org/10.1038/s44271-025-00272-z

Driving change: A scoping review of psychological interventions to reduce engine idling and air pollution

*†Lalot, F., †Imada, H., Hopthrow, T., & Abrams, D. (2025). Driving change: A scoping review of psychological interventions to reduce engine idling and air pollution. Journal of Environmental Psychology, 106, 102691. https://doi.org/10.1016/j.jenvp.2025.102691 [† joint first authorship]

Understanding the role of pluralistic ignorance in biodiversity conservation: A research agenda

*Geiger, S. J., Imada, H., Maharja, C., Powdthavee, N., Vitale, V., Zhang, L., Rosa, C. D., (…) White, M. P. (2025). Understanding the role of pluralistic ignorance in biodiversity conservation: A research agenda. Global Environmental Change, 95, 103043. https://doi.org/10.1016/j.gloenvcha.2025.103043

Cross-temporal replication of the relationship between SDO and political attitudes in Japan: SDO and attitudes shifted but the relationship holds

*Takahashi, R., Imada, H., & Mifune, N. Cross-temporal replication of the relationship between SDO and political attitudes in Japan: SDO and attitudes shifted but the relationship holds. (2025). The Journal of Social and Political Psychology, 13(2), 210-222. https://doi.org/10.5964/jspp.16589

The relative effectiveness of positive and negative gossip in promoting prosocial giving: the examination of the valence of gossip content and reputational consequences

*Imada, H. (2026). The relative effectiveness of positive and negative gossip in promoting prosocial giving: the examination of the valence of gossip content and reputational consequences. Japanese Psychological Research, 68(2), 310-319. https://doi.org/10.1111/jpr.12473

Effects of race and political identity on interpersonal cooperation: A secondary analysis and replication

Willcox, K., Imada, H., Rumble, A., Yansen, D., & *Brewer, M. B. (2026). Effects of race and political identity on interpersonal cooperation: A secondary analysis and replication. Political Psychology, 47(2), e70047. https://doi.org/10.1111/pops.70047

Macro-economic inequality and national stereotypes in 45 non-Western countries

*Gligorić, V., Jost, J. T., Pezzia, A. E., Balabanova, A., Carlevari, A. V., Lazar, A., Kende, A., … Imada, H., … , Khosrowtaj, Z. (2025). Macro-economic inequality and national stereotypes in 45 non-Western countries. Social Psychological and Personality Science, 17(4), 492-509. https://doi.org/10.1177/19485506251370424

Neurocomputational mechanisms of maladaptive behaviours in loneliness

*Bellucci, G., Imada, H., Fett, A., & Ito, A. (2026). Neurocomputational mechanisms of maladaptive behaviours in loneliness. Trends in Cognitive Sciences, 30(3), 251-263. https://doi.org/10.1016/j.tics.2025.07.007

Audience costs in the eyes of an adversary

*Takei, M., Moon, C., & Imada, H. (2026). Audience costs in the eyes of an adversary. Research & Politics, 13(1), 20531680261428603. https://doi.org/10.1177/20531680261428603

Social norms and group-bounded indirect reciprocity

*Tateishi, W., & *Imada, H. (2026). Social norms and group-bounded indirect reciprocity. Evolutionary Human Sciences, 8, e13. https://doi.org/10.1017/ehs.2026.10045

The co-occurrence of ingroup and outgroup prosociality requires cross-group partner choice

*Xiao, Q., & Imada, H. (2026). The co-occurrence of ingroup and outgroup prosociality requires cross-group partner choice. Proceedings of the National Academy of Sciences, 123(24), e2606967123. https://doi.org/10.1073/pnas.2606967123

Validity of online social identity mapping (oSIM) in Japan

*Ito, A., Himichi, T., Imada, H., Takashima, R., Haslam, A., McMillan, B., & Igarashi, T. (in press). Validity of online social identity mapping (oSIM) in Japan. Japanese Psychological Research. https://doi.org/10.1111/jpr.12591

Linking anger and disgust to motives and anticipations of aggression in the East: testing a socio-functional account of moral emotions in Japan

*Fan, L., Molho, C., Imada, H., Tybur, J. M., & van Leeuwen, F. (in press). Anger, disgust, and their link to aggressive punishments in the East: Testing the socio-functional account of condemning moral emotions in Japan. Cognition and Emotion. https://doi.org/10.1080/02699931.2025.2572709

talks

teaching

Teaching experience 1

Undergraduate course, University 1, Department, 2014

This is a description of a teaching experience. You can use markdown like any other post.

Teaching experience 2

Workshop, University 1, Department, 2015

This is a description of a teaching experience. You can use markdown like any other post.