ISSN 1671-3710
CN 11-4766/R
主办:中国科学院心理研究所
出版:科学出版社

心理科学进展 ›› 2016, Vol. 24 ›› Issue (Suppl.): 69-.

• 研究前沿 • 上一篇    下一篇

全局与局部加工的时间动态性研究

  

  • 出版日期:2016-12-31 发布日期:2016-12-31

Temporal dynamics of global/local processing

Ling Liu; Qiaoli Huang; Huan Luo   

  1. Department of Psychology, Peking University, 52 Haidian Road, Haidian Dist, Beijing, China, 100871
    IDG/McGovern Institute for Brain Research, Peking University, 52 Haidian Road, Haidian Dist, Beijing, China, 100871
  • Online:2016-12-31 Published:2016-12-31

Abstract:

PURPOSE: It has been suggested that processing of global and local properties is associated with neuronal oscillations at different rhythms. Recently, by employing a time-resolved behavioral measurement, several visual attentional studies have revealed neurophysiologically relevant rhythms directly in behavioral performances, suggesting that the underlying neuronal dynamics might be manifested directly at the behavioral level. Here we applied this time-resolved behavioral approach to access the temporal dynamics of global/local processing.
METHODS: The stimuli are a big arrow (global) composed of small arrows (local). The global and local properties are either congruent or incongruent. After cued by a text of 'Global' or 'Local', subjects reported the global or local properties of the target as fast as possible and their reaction times were recorded. The cue-to-target SOA varied from 110 to 600ms in steps of 10ms.
RESULTS: First, we replicated typical global precedence e?ects (global faster than local) in slow trends of the time-resolved behavioral time courses. Second, with the slow trends removed, the global processing demonstrated a rhythmic fluctuation at alpha band (~10 Hz), which are in phase between the congruent and incongruent conditions, suggesting that the global property is sampled in an alpha-band rhythm, not influenced by local properties. Relatively in contrast, the local processing demonstrated a rhythmic fluctuation at beta band (~26 Hz), which showed an ‘out-of-phase’ relationship between the congruent and incongruent conditions, which suggest a global precedence e?ect in oscillation, implicating that local processing is largely driven and modulated by the global property.
CONCLUSIONS: Our results provide behavioral evidence supporting the central role of neuronal oscillations in global/local processing. Our study also speaks for a dynamic framework within which global and local.

Key words: Global-local, global precedence, behavior oscillation