{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T23:30:57Z","timestamp":1787009457825,"version":"build-2736575974"},"reference-count":44,"publisher":"Oxford University Press (OUP)","license":[{"start":{"date-parts":[[2023,6,21]],"date-time":"2023-06-21T00:00:00Z","timestamp":1687305600000},"content-version":"vor","delay-in-days":171,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/\u00a0","name":"JSPS","doi-asserted-by":"publisher","award":["JP20K11963"],"award-info":[{"award-number":["JP20K11963"]}],"id":[{"id":"10.13039\/\u00a0","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,2,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Interpersonal brain synchronization (IBS) has been observed during social interactions and involves various factors, such as familiarity with the partner and type of social activity. A previous study has shown that face-to-face (FF) interactions in pairs of strangers increase IBS. However, it is unclear whether this can be observed when the nature of the interacting partners is different. Herein, we aimed to extend these findings to pairs of acquaintances. Neural activity in the frontal and temporal regions was recorded using functional near-infrared spectroscopy hyperscanning. Participants played an ultimatum game that required virtual economic exchange in two experimental settings: face-to-face and face-blocked conditions. Random pair analysis confirmed whether IBS was induced by social interaction. Contrary to the aforementioned study, our results did not show any cooperative behavior or task-induced IBS increase. Conversely, the random pair analysis results revealed that the pair-specific IBS was significant only in the task condition at the left and right superior frontal, middle frontal, orbital superior frontal, right superior temporal, precentral and postcentral gyri. Our results tentatively suggested that FF interaction in acquainted pairs did not increase IBS and supported the idea that IBS is affected by \u2018with whom we interact and how\u2019.<\/jats:p>","DOI":"10.1093\/oons\/kvad007","type":"journal-article","created":{"date-parts":[[2023,6,21]],"date-time":"2023-06-21T08:32:41Z","timestamp":1687336361000},"source":"Crossref","is-referenced-by-count":4,"title":["Interpersonal brain synchronization during face-to-face economic exchange between acquainted dyads"],"prefix":"10.1093","volume":"2","author":[{"given":"Yuto","family":"Kikuchi","sequence":"first","affiliation":[{"name":"Doshisha University Graduate School of Life and Medical Sciences, , 1-3 Tatara Miyakodani, Kyotanabe,\u00a0Kyoto610-0394, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9621-5871","authenticated-orcid":false,"given":"Kensuke","family":"Tanioka","sequence":"additional","affiliation":[{"name":"Doshisha University Department of Biomedical Sciences and Informatics, , 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0730-7905","authenticated-orcid":false,"given":"Tomoyuki","family":"Hiroyasu","sequence":"additional","affiliation":[{"name":"Doshisha University Department of Biomedical Sciences and Informatics, , 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6547-626X","authenticated-orcid":false,"given":"Satoru","family":"Hiwa","sequence":"additional","affiliation":[{"name":"Doshisha University Department of Biomedical Sciences and Informatics, , 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2023,6,21]]},"reference":[{"key":"2023091211245353400_ref1","doi-asserted-by":"crossref","first-page":"3281","DOI":"10.1098\/rstb.2009.0134","article-title":"Culture and the evolution of human cooperation","volume":"364","author":"Boyd","year":"2009","journal-title":"Philos Trans R Soc B: Biol Sci"},{"key":"2023091211245353400_ref2","doi-asserted-by":"crossref","first-page":"438","DOI":"10.1038\/s41562-018-0387-3","article-title":"The neuroeconomics of cooperation","volume":"2","author":"Declerck","year":"2018","journal-title":"Nat Hum Behav"},{"key":"2023091211245353400_ref3","doi-asserted-by":"crossref","first-page":"349","DOI":"10.4161\/cib.4.3.15110","article-title":"Towards a two-body neuroscience","volume":"4","author":"Dumas","year":"2011","journal-title":"Commun Integr Biol"},{"key":"2023091211245353400_ref4","doi-asserted-by":"crossref","first-page":"2954","DOI":"10.3389\/fpsyg.2019.02954","article-title":"The relevance of a conductor competition for the study of emotional synchronization within and between groups in a natural musical setting","volume":"10","author":"Chabin","year":"2020","journal-title":"Front Psychol"},{"key":"2023091211245353400_ref5","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1038\/s41598-018-24416-w","article-title":"Multiple-brain connectivity during third party punishment: an EEG hyperscanning study","volume":"8","author":"Ciaramidaro","year":"2018","journal-title":"Sci Rep"},{"key":"2023091211245353400_ref6","doi-asserted-by":"crossref","first-page":"ENEURO.0284","DOI":"10.1523\/ENEURO.0284-18.2019","article-title":"What makes eye contact special? 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