Behaviour locking shows interactive gestures accompany the superior inter-brain state (State 1), while the absence of gestures accompanies the inferior state under ONE¶

Claim · All claims
Evidence · 1 study (3 entries) · causal r2 · q3 · i3 large
Currency · newest study 2024 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i3 In the BOTH condition, when using interactive gestures, the occurrence rate of State 1 was significantly higher than that of States 2 and 3 (ηP² = 0.61). → Xinyue Wang 2024 q3 i3 In the ONE condition, when participants were not using gestures, the occurrence rate of State 3 was significantly higher than States 1 and 2 (ηP² = 0.16). → Xinyue Wang 2024 (2) q3 i? Interactive gestures yielded significantly higher ROI strength in FPC, rDLPFC and rPSC than fluid gestures or no gestures under BOTH. → Xinyue Wang 2024 (3)

Evidence¶

Xinyue Wang 2024¶

Xinyue Wang, Kelong Lu, Yingyao He, Xinuo Qiao, Zhenni Gao, Yu Zhang & Ning Hao. (2024). Dynamic brain networks in spontaneous gestural communication. npj Science of Learning. https://doi.org/10.1038/s41539-024-00274-2

q3 · i3 · causal · r2

Behaviour locking analysis in the BOTH condition of the 27-dyad fNIRS hyperscanning study, ηP² = 0.61. The article links this to mentalizing regions involved in "discerning and anticipating others’goals and intentions".

"when using interactive ges- tures, the occurrence rate of State 1 was significantly higher than that of State 2a n d3( F (2,52) = 40.06, P < 0.001, ηP 2 =0 . 6 1"

Xinyue Wang 2024 (2)¶

Xinyue Wang, Kelong Lu, Yingyao He, Xinuo Qiao, Zhenni Gao, Yu Zhang & Ning Hao. (2024). Dynamic brain networks in spontaneous gestural communication. npj Science of Learning. https://doi.org/10.1038/s41539-024-00274-2

q3 · i3 · causal · r2

Behaviour locking analysis in the ONE condition, ηP² = 0.16. The article concludes "the absence of gestures is associated with an arising of inefficient inter-brain states".

"the occurrence rate of State 3 was significantly higher than that of State 1 and 2 when participants were not using gestures ( F (2,52) = 5.00, P = 0.010, ηP 2 =0 . 1 6"

Xinyue Wang 2024 (3)¶

Xinyue Wang, Kelong Lu, Yingyao He, Xinuo Qiao, Zhenni Gao, Yu Zhang & Ning Hao. (2024). Dynamic brain networks in spontaneous gestural communication. npj Science of Learning. https://doi.org/10.1038/s41539-024-00274-2

q3 · i? · causal · r2

Repeated-measures ANOVA on ROI strength of dISFC states across gesture types under BOTH (FDR corrected; Fig. 5b). Contrast: interactive vs fluid gestures and no gestures. The article interprets this as neural engagement in understanding others' actions and intentions.

"when using interactive gestures, participants presented with significantly higher ROI strength in the frontopolar cortex (FPC), right dorsolateral prefrontal cortex (rDLPFC) and rPSC areas compared with using fluid gestures and not using gestures"

Discussion¶

Related Claims¶

• State 1 of dynamic inter-brain connectivity is a superior communication state: higher global efficiency, clustering and ROI strength, lower path length, with ISFC increments in mirroring and mentalizing regions — a broader claim this one bears on
• Fluid gestures accompany the superior intra-brain state (State 1) of the gesturing participant, whose occurrence rate correlates with fluency — related
• When only one participant could gesture, that participant used fewer interactive and more fluid gestures than the per-person rate under BOTH — related
• Averaging brain connectivity over the whole task period failed to detect intra-brain differences between gesture conditions, motivating dynamic analysis — related