{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T09:15:02Z","timestamp":1785402902615,"version":"3.56.0"},"reference-count":50,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T00:00:00Z","timestamp":1785369600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004260","name":"Renmin University of China","doi-asserted-by":"publisher","award":["RXB013"],"award-info":[{"award-number":["RXB013"]}],"id":[{"id":"10.13039\/501100004260","id-type":"DOI","asserted-by":"publisher"}]},{"award":["RXB013"],"award-info":[{"award-number":["RXB013"]}],"id":[{"id":"https:\/\/ror.org\/041pakw92","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Brain Sci.","Brain Sciences"],"abstract":"<jats:p>Background: Shared attention facilitates interpersonal emotional sharing, yet the neural mechanisms modulated by interpersonal relationships, emotional valence, and visual consistency remain unclear. Methods: This study recruited 39 dyads (22 friend dyads, 17 stranger dyads) who viewed neutral, positive, and negative images under shared or non-shared attention while image consistency between partners was manipulated. Emotional ratings and electroencephalography (EEG) inter-brain synchrony were recorded. Results: Behaviorally, shared attention shifted emotional processing toward positivity, especially in friend dyads. EEG hyperscanning revealed that shared attention was associated with increased beta and theta band inter-brain synchrony in the prefrontal cortex for friends, but decreased synchrony for strangers, and alpha band synchrony decreased with shared attention when viewing consistent images. Conclusions: These findings reveal band-specific neural mechanisms through which shared attention modulates emotion across friendship, offering new insights into emotional regulation in social interactions.<\/jats:p>","DOI":"10.3390\/brainsci16080809","type":"journal-article","created":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T08:09:42Z","timestamp":1785398982000},"page":"809","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Influence of Shared Attention and Friendship on Emotional Processing: A Behavioral and EEG Hyperscanning Study"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-3512-7139","authenticated-orcid":false,"given":"Siyu","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Psychology, Renmin University of China, Beijing 100086, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meng","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Psychology, Renmin University of China, Beijing 100086, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chuyan","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Psychology, Renmin University of China, Beijing 100086, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3798-3752","authenticated-orcid":false,"given":"Conghui","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Psychology, Renmin University of China, Beijing 100086, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.copsyc.2017.12.007","article-title":"A collective perspective: Shared attention and the mind","volume":"23","author":"Shteynberg","year":"2018","journal-title":"Curr. Opin. Psychol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"102","DOI":"10.1016\/j.jesp.2014.04.010","article-title":"Individualism-collectivism and interpersonal memory guidance of attention","volume":"54","author":"He","year":"2014","journal-title":"J. Exp. Soc. Psychol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1016\/j.jesp.2014.03.015","article-title":"Cues of working together fuel intrinsic motivation","volume":"53","author":"Carr","year":"2014","journal-title":"J. Exp. Soc. Psychol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1102","DOI":"10.1037\/a0037697","article-title":"Feeling more together: Group attention intensifies emotion","volume":"14","author":"Shteynberg","year":"2014","journal-title":"Emotion"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2209","DOI":"10.1177\/0956797614551162","article-title":"Shared experiences are amplified","volume":"25","author":"Boothby","year":"2014","journal-title":"Psychol. Sci."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"801","DOI":"10.1093\/scan\/nsu121","article-title":"Beautiful friendship: Social sharing of emotions improves subjective feelings and activates the neural reward circuitry","volume":"10","author":"Wagner","year":"2015","journal-title":"Soc. Cogn. Affect. Neurosci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1145","DOI":"10.3758\/s13415-021-00982-x","article-title":"Influence of eating together on brain activation and hedonic evaluation in response to foods","volume":"22","author":"Huang","year":"2022","journal-title":"Cogn. Affect. Behav. Neurosci."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"917","DOI":"10.1162\/jocn_a_01841","article-title":"Shared attention amplifies the neural processing of emotional faces","volume":"34","author":"Sessa","year":"2022","journal-title":"J. Cogn. Neurosci."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Christou, A.I., Fanti, K., Mavrommatis, I., and Soursou, G. (2025). Child\u2013parent covariation on the processing of angry facial stimuli predicts children\u2019s reactive aggression. Psychol. Violence, advance online publication.","DOI":"10.1037\/vio0000659"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Czeszumski, A., Eustergerling, S., Lang, A., Menrath, D., Gerstenberger, M., Schuberth, S., Schreiber, F., Rendon, Z.Z., and K\u00f6nig, P. (2020). Hyperscanning: A valid method to study neural inter-brain underpinnings of social interaction. Front. Hum. Neurosci., 14.","DOI":"10.3389\/fnhum.2020.00039"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"522","DOI":"10.1080\/17470919.2021.1970016","article-title":"Father-child dyads exhibit unique inter-subject synchronization during co-viewing of animation video stimuli","volume":"16","author":"Azhari","year":"2021","journal-title":"Soc. Neurosci."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"401","DOI":"10.1016\/j.neuroimage.2015.09.076","article-title":"Neural substrates of shared attention as social memory: A hyperscanning functional magnetic resonance imaging study","volume":"125","author":"Koike","year":"2016","journal-title":"NeuroImage"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"6053","DOI":"10.1002\/hbm.25669","article-title":"Effects of social and emotional context on neural activation and synchrony during movie viewing","volume":"42","author":"Dziura","year":"2021","journal-title":"Hum. Brain Mapp."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"e3181","DOI":"10.1002\/brb3.3181","article-title":"Pseudo-mutual gazing enhances interbrain synchrony during remote joint attention tasking","volume":"13","author":"Chuang","year":"2023","journal-title":"Brain Behav."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"23","DOI":"10.7358\/neur-2018-024-balc","article-title":"EEG hyperscanning and behavioral synchronization during a joint actions","volume":"2018","author":"Balconi","year":"2018","journal-title":"Neuropsychol. Trends"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1431","DOI":"10.1177\/0146167216662869","article-title":"Psychological distance moderates the amplification of shared experience","volume":"42","author":"Boothby","year":"2016","journal-title":"Personal. Soc. Psychol. Bull."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"105979","DOI":"10.1016\/j.neubiorev.2024.105979","article-title":"Relational neuroscience: Insights from hyperscanning research","volume":"169","author":"Chand","year":"2025","journal-title":"Neurosci. Biobehav. Rev."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"kvae006","DOI":"10.1093\/oons\/kvae006","article-title":"Having a chat and then watching a movie: How social interaction synchronises our brains during co-watching","volume":"3","author":"Hakim","year":"2024","journal-title":"Oxf. Open Neurosci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"120473","DOI":"10.1016\/j.neuroimage.2023.120473","article-title":"Influence of interpersonal distance on collaborative performance in the joint Simon task-An fNIRS-based hyperscanning study","volume":"285","author":"Song","year":"2024","journal-title":"NeuroImage"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Heng, W.X., Ng, L.Y., Goh, Z.Z., Esposito, G., and Azhari, A. (2025). Romantic partners with mismatched relationship satisfaction showed greater interpersonal neural synchrony when co-viewing emotive videos: An exploratory pilot fNIRS hyperscanning study. NeuroSci, 6.","DOI":"10.3390\/neurosci6020055"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"346","DOI":"10.1016\/j.tins.2022.02.002","article-title":"Interbrain synchrony: On wavy ground","volume":"45","author":"Holroyd","year":"2022","journal-title":"Trends Neurosci."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"116559","DOI":"10.1016\/j.neuroimage.2020.116559","article-title":"Natural music evokes correlated EEG responses reflecting temporal structure and beat","volume":"214","author":"Kaneshiro","year":"2020","journal-title":"NeuroImage"},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Gvirts Provolovski, H.Z., and Perlmutter, R. (2021). How can we prove the causality of interbrain synchronization?. Front. Hum. Neurosci., 15.","DOI":"10.3389\/fnhum.2021.651949"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"96","DOI":"10.1016\/j.tics.2020.11.003","article-title":"Hyperscanning alone cannot prove causality. Multibrain stimulation can","volume":"25","author":"Novembre","year":"2021","journal-title":"Trends Cogn. Sci."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"16064","DOI":"10.1523\/JNEUROSCI.2926-12.2012","article-title":"Neural synchronization during face-to-face communication","volume":"32","author":"Jiang","year":"2012","journal-title":"J. Neurosci."},{"key":"ref_26","first-page":"719","article-title":"The development of native Chinese affective picture system-A pretest in 46 college students","volume":"19","author":"Lu","year":"2005","journal-title":"Chin. Ment. Health J."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1016\/0005-7916(94)90063-9","article-title":"Measuring emotion: The self-assessment manikin and the semantic differential","volume":"25","author":"Bradley","year":"1994","journal-title":"J. Behav. Ther. Exp. Psychiatry"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"596","DOI":"10.1037\/0022-3514.63.4.596","article-title":"Inclusion of Other in the Self Scale and the structure of interpersonal closeness","volume":"63","author":"Aron","year":"1992","journal-title":"J. Personal. Soc. Psychol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"390","DOI":"10.1016\/j.jml.2007.12.005","article-title":"Mixed-effects modeling with crossed random effects for subjects and items","volume":"59","author":"Baayen","year":"2008","journal-title":"J. Mem. Lang."},{"key":"ref_30","first-page":"1","article-title":"An introduction to linear mixed-effects modeling in R","volume":"4","author":"Brown","year":"2021","journal-title":"Adv. Methods Pract. Psychol. Sci."},{"key":"ref_31","unstructured":"Singmann, H., Bolker, B., and Westfall, J. (2025, June 15). Afex: Analysis of Factorial Experiments, R Package Version 0.15-2. Available online: http:\/\/CRAN.R-project.org\/package=afex."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v067.i01","article-title":"Fitting linear mixed-effects models using lme4","volume":"67","author":"Bates","year":"2015","journal-title":"J. Stat. Softw."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v082.i13","article-title":"lmerTest Package: Tests in Linear Mixed Effects Models","volume":"82","author":"Kuznetsova","year":"2017","journal-title":"J. Stat. Softw."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"101104","DOI":"10.1016\/j.dcn.2022.101104","article-title":"DEEP: A dual EEG pipeline for developmental hyperscanning studies","volume":"54","author":"Kayhan","year":"2022","journal-title":"Dev. Cogn. Neurosci."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Dumas, G., Nadel, J., Soussignan, R., Martinerie, J., and Garnero, L. (2010). Inter-brain synchronization during social interaction. PLoS ONE, 5.","DOI":"10.1371\/journal.pone.0012166"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1177\/0963721421992027","article-title":"Shared reality: From sharing-is-believing to merging minds","volume":"30","author":"Higgins","year":"2021","journal-title":"Curr. Dir. Psychol. Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"575","DOI":"10.1007\/s42761-025-00324-x","article-title":"The role of cognitive effort in emotion regulation","volume":"6","author":"Scheffel","year":"2025","journal-title":"Affect. Sci."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"60","DOI":"10.1177\/1754073908097189","article-title":"Emotion elicits the social sharing of emotion: Theory and empirical review","volume":"1","year":"2009","journal-title":"Emot. Rev."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Goldring, M.R., Pinelli, F., Bolger, N., and Higgins, E.T. (2022). Shared reality can reduce stressor reactivity. Front. Psychol., 13.","DOI":"10.3389\/fpsyg.2022.853750"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"e70259","DOI":"10.1111\/psyp.70259","article-title":"Physical proximity with social support regulates vigilance to threat: Evidence from startle reactivity during emotional stress induction","volume":"63","author":"Maffei","year":"2026","journal-title":"Psychophysiology"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"334","DOI":"10.1016\/j.ijpsycho.2013.05.007","article-title":"EEG beta band activity is related to attention and attentional deficits in the visual performance of elderly subjects","volume":"89","author":"Gola","year":"2013","journal-title":"Int. J. Psychophysiol."},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Lim, S., Yeo, M., and Yoon, G. (2019). Comparison between concentration and immersion based on EEG analysis. Sensors, 19.","DOI":"10.3390\/s19071669"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1016\/j.brainresbull.2009.07.001","article-title":"BIS\/BAS, cortical oscillations and coherence in response to emotional cues","volume":"80","author":"Balconi","year":"2009","journal-title":"Brain Res. Bull."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"324","DOI":"10.1016\/j.biopsycho.2017.09.013","article-title":"Electrocortical measures of information processing biases in social anxiety disorder: A review","volume":"129","author":"Harrewijn","year":"2017","journal-title":"Biol. Psychol."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"nsaf050","DOI":"10.1093\/scan\/nsaf050","article-title":"Non-verbal joint action in healthy adults: A systematic scoping review of EEG-hyperscanning research","volume":"20","author":"Fiedler","year":"2025","journal-title":"Soc. Cogn. Affect. Neurosci."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Foxe, J.J., and Snyder, A.C. (2011). The role of alpha-band brain oscillations as a sensory suppression mechanism during selective attention. Front. Psychol., 2.","DOI":"10.3389\/fpsyg.2011.00154"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1016\/j.copsyc.2019.03.015","article-title":"The functional role of alpha-band activity in attentional processing: The current zeitgeist and future outlook","volume":"29","author":"Foxe","year":"2019","journal-title":"Curr. Opin. Psychol."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"414","DOI":"10.1016\/j.neuropsychologia.2016.07.027","article-title":"Neural alpha oscillations index the balance between self-other integration and segregation in real-time joint action","volume":"89","author":"Novembre","year":"2016","journal-title":"Neuropsychologia"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"1585","DOI":"10.1002\/aur.2513","article-title":"Dysfunction in interpersonal neural synchronization as a mechanism for social impairment in autism spectrum disorder","volume":"14","author":"Fishburn","year":"2021","journal-title":"Autism Res."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"1264","DOI":"10.1093\/scan\/nsab082","article-title":"Neural substrates of shared visual experiences: A hyperscanning fMRI study","volume":"16","author":"Yoshioka","year":"2021","journal-title":"Soc. Cogn. Affect. Neurosci."}],"container-title":["Brain Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2076-3425\/16\/8\/809\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T08:39:07Z","timestamp":1785400747000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2076-3425\/16\/8\/809"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,7,30]]},"references-count":50,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2026,8]]}},"alternative-id":["brainsci16080809"],"URL":"https:\/\/doi.org\/10.3390\/brainsci16080809","relation":{},"ISSN":["2076-3425"],"issn-type":[{"value":"2076-3425","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,7,30]]}}}