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The experiment contains 2 conditions: the dyad collaborated to win and then split the reward in the cooperation condition, whereas the winner took all the reward in the competition condition, thereby resulting in dynamic strategic interactions. To calculate the cerebral coherence in such jittered event-related fMRI tasks, we first iteratively estimated the feedback-related blood oxygenation level-dependent responses of each trial, using 8 finite impulse response functions (16\u00a0s) and then concatenated the beta volume series. With the right temporal\u2013parietal junction (rTPJ) as the seed, the interpersonal connected brain areas were separately identified: the right superior temporal gyrus (rSTG) (cooperation) and the left precuneus (lPrecuneus) (competition), both peaking at the designated frequency bin (1\/16\u00a0s\u2009=\u20090.0625\u00a0Hz), but not in permuted pairs. In addition, the extended coherence analyses on shorter and longer concatenated volumes verified that only in the optimal trial frequency did the rTPJ\u2013rSTG and rTPJ\u2013lPrecuneus couplings peak. In sum, our approach both showcases a flexible analysis method that widens the applicability of interpersonal coherence in the rapid event-related fMRI hyperscanning and reveals a context-based inter-brain coupling between interacting pairs during cooperation and during competition.<\/jats:p>","DOI":"10.1093\/cercor\/bhac075","type":"journal-article","created":{"date-parts":[[2022,2,8]],"date-time":"2022-02-08T20:12:18Z","timestamp":1644351138000},"page":"421-433","source":"Crossref","is-referenced-by-count":17,"title":["Distinct cerebral coherence in task-based fMRI hyperscanning: cooperation versus competition"],"prefix":"10.1093","volume":"33","author":[{"given":"Le-Si","family":"Wang","sequence":"first","affiliation":[{"name":"Institute of Creative Industries Design , , No. 1, University Road, Tainan City 701 , Taiwan"},{"name":"National Cheng Kung University (NCKU) , , No. 1, University Road, Tainan City 701 , 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