ISSN 0439-755X
CN 11-1911/B

Acta Psychologica Sinica ›› 2026, Vol. 58 ›› Issue (6): 1015-1027.doi: 10.3724/SP.J.1041.2026.1015

• Reports of Empirical Studies •     Next Articles

Roles of Global Configuration and Local Motion in Beat Synchronization with Biological Motion

LU Xiaoman, DU Yike, YE Wenlong, WANG Haifei, MENG Lu, ZHOU Liang()   

  1. School of Psychology, Shandong Provincial Key Laboratory of Brain Science and Mental Health, Shandong Normal University, Jinan 250014, China
  • Received:2025-03-15 Published:2026-06-25 Online:2026-04-28
  • Contact: ZHOU Liang E-mail:Zhouliang_group@163.com
  • Supported by:
    National Natural Science Foundation of China(32100853);National Natural Science Foundation of China(31871100);Natural Science Foundation of Shandong Province(ZR2021QC134);Shandong Provincial Higher Education Youth Innovation Team Program(2023KJ196)

Abstract:

Using an adapted beat synchronization paradigm, the present study investigated the effects of global configuration and local motion on beat synchronization with biological motion. Experiment 1 showed that synchronization stability was significantly higher under the standard BM condition than under the scrambled BM condition; furthermore, when global configuration was disrupted, comparing the scrambled BM and inverted-scrambled BM conditions revealed no significant effect of disrupting the biological nature of local motion direction on synchronization stability. Experiment 2, conducted under the premise of disrupted global configuration, compared synchronization stability across three conditions: scrambled BM, inverted-scrambled BM, and constant-velocity-scrambled BM. Disrupting either the biological nature of motion direction or the biological nature of velocity variation produced no significant difference in synchronization stability relative to the condition in which local biological motion was preserved. Experiment 3 revealed an interaction effect: when global configuration was intact, the constant-velocity-unscrambled BM condition yielded significantly lower synchronization stability than the standard BM condition; when global configuration was disrupted, synchronization performance did not differ between the scrambled BM and constant-velocity-scrambled BM conditions. The results support a Bayesian “global prior-local likelihood matching” mechanism: an intact human body configuration activates biological motion templates as a strong prior; when local motion retains its biological nature, the likelihood matches the prior, prediction error is minimized, the sensorimotor timing load is reduced, and synchronization is most stable; when global configuration is disrupted, a strong prior cannot be established, the brain becomes insensitive to the biological nature of local motion, and synchronization performance converges regardless of whether local biological motion is preserved or disrupted. These findings indicate that global configuration dominates prior generation, while local biological motion modulates sensorimotor timing only when a prior is in place, providing new evidence for the hierarchical processing mechanism underlying biological motion perception.

Key words: biological motion, beat synchronization, global configuration, local motion