Task and interpersonal interdependence interact on intra-brain FC in DLPFC.R and SMG.R: strangers show higher FC under HICT, friends show higher FC under LICT¶

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Intra-brain FC between DLPFC.R and SMG.R showed a significant task × interpersonal interdependence interaction. → Zijun Yin 2025 q3 i? Under LICT, friend dyads showed higher intra-brain FC than stranger dyads, while under stranger dyads HICT yielded higher FC than LICT. → Zijun Yin 2025

Evidence¶

Zijun Yin 2025¶

Zijun Yin, Bin Xuan, Chengchi Liu, Jingchao Yi, Xiaoyan Zheng & Mingming Zhang. (2025). The influence of task and interpersonal interdependence on cooperative behavior and its neural mechanisms. npj Science of Learning. https://doi.org/10.1038/s41539-025-00303-8

q3 · i? · causal · r2

Repeated measures 2×2 ANOVA across 21 fNIRS channels found a significant interaction in BA9 (DLPFC.R) and BA40 (SMG.R), "F (1, 66) = 4.234*, p = 0.044, ηp2 = 0.060"; post hoc tests showed friend > stranger FC under LICT (p = 0.041) and HICT > LICT for strangers (p = 0.026).

"the intra-brain FC values under the friend dyad were significantly higher than those under the stranger dyad in the BA9 (CH04: DLPFC.R) and BA40 (CH18: SMG.R),p = 0.041."

Discussion¶

Related Claims¶

• Task and interpersonal interdependence interact on inter-brain synchrony in the right supramarginal gyrus — related
• In HICT, friend dyads' key-pressing scores correlate positively with IBS in right DLPFC and right pars triangularis — related
• High interdependent cooperation tasks yield higher key-pressing scores than low interdependent tasks for both friend and stranger dyads — related