ISSN 0439-755X
CN 11-1911/B

Acta Psychologica Sinica ›› 2021, Vol. 53 ›› Issue (4): 337-348.doi: 10.3724/SP.J.1041.2021.00337

• Reports of Empirical Studies •     Next Articles

Temporal dynamics of eye movements and attentional modulation in perceptual judgements of structure-from-motion (SFM)

DING Jinhong1(), WANG Yamin1, JIANG Yang2   

  1. 1 Beijing Key Lab of Learning and Cognition, Collage of Psychology, Capital Normal University, Beijing, 100048, China
    2 Department of Behavioral Science, College of Medicine, University of Kentucky, Lexington, KY 40536-0086, USA
  • Received:2020-04-14 Published:2021-04-25 Online:2021-02-22
  • Contact: DING Jinhong


By using depth visual cues, the eye movements of 22 participants were recorded during perceiving the 3D SFM (structure from motion) to explore the effect of attention on SFM perception and its time course. The results showed that the judgement of cue stimulus was faster and more certain (higher percentage) than that of an ambiguous stimulus. The directions of eye movement and microsaccade were consistent with that of perceptual judgement, respectively. Microsaccade frequency (rate), peak velocity, and amplitude also showed the facilitating effect of depth cue. The results suggest that SFM can be divided into two stages: velocity calculation and construction of the three-dimensional structure. The modulation of attention to SFM perception mainly occurs in the construction of the three-dimensional structure stage, and attention orients to the selected object from 150 ms. After staying about 200 ms, attention will shift to the perception of global motion direction from local motion vector flow.

Key words: structure-from-motion (SFM), attention, microsaccade, time course, perceptual grouping