Junzhu Su


UCLA, Department of Psychology 09/2011-10/2016
PhD in Cognitive Psychology with specialization in Computational Cognition Advisor: Prof. Hongjing Lu

Peking University, Department of Psychology 09/2008-07/2011
Master of Science in Cognitive Neuroscience Advisor: Prof. Fang Fang

Peking University, Department of Psychology 09/2004-07/2008
Bacholar of Science in Psychology
Thesis: “Ebbinghaus Illusion Outside Awareness” Advisors: Prof. Fang Fang

Research Interests:
General interests in visual cognitive neuroscience includes using methods such as psychophysics, EEG, fMRI, computation or neural recording to study perception, learning, and attention. Previously, I focused on the nerual mechanisms of perceptual learning of face views and face genders. Now, I am quite interested in human action cognition (specifically, with biological motion stimuli). I would like to investigate topics such as action categories, action prediction, and interaction between action and attention or awareness using psychophysics methods. I am also fascinated about other human high level cognitive functions such as decision making or complex reasoning using imaging techniques and quantitative modeling.

Research Experiences:
CVL lab, UCLA, PhD Advisor: Prof. Hongjing Lu 
The top down modulation of action prediction on Flash Lag Effect  03/2014-10/2016
--Discovered that forward walker modulated more on Flash Lag Effect compared to backward walker since people are better at predicting natural action
--To see whether upward actors will modulate more on FLE compared to inverted actors 

The role of meaningful interaction in action prediction 09/2011-04/2016
--Used psychophysics to study whether observing two actors doing meaningful interaction will help observers to predict the future poster of one actor.
--Discovered that humans excel in predicting when an action posture will occur in the future when viewing a single actor, but are better able to predict what posture will occur based upon a meaningful interaction between two actors. 

The role of meaningful interaction in action perception under visual conficts 10/2011-09/2015
--Used binocular paradigms to study whether the dancer doing meaningful interaction (salsa dancing) with a third dancer would been seen more often than a second dancer doing meaningless interaction with the same third dancer when each of the first two dancers is displayed to each single eye simultaneously.
--Discovered that people will perceive the meaningful dancer 8% of the time more often than the meaningless dancer.

Vision Cognitive Neuroscience Lab, Peking University Beijing, China Research Assistant Advisor: Prof. Fang Fang
The neural mechanism of perceptual learning of face view discrimination 04/2009– 07/2011
--Combined psychophysics and Electroencephalography (EEG) to study the neural mechanism of perceptual learning of face view discrimination.
--Discovered that, after training, the latency of N170 at the left temporal lobe (P7) evoked by the trained face view was significantly shortened and the induced gamma power by the trained face view at left prefrontal position was significantly reduced, both highly specific to the trained face view.

The effect of gaze direction on face view perception 03/2007 – 06/2009
--Used psychophysics to study the contribution of gaze direction adaptation to the formation of face viewpoint aftereffect.
--Obtained that a tiny (in terms of relative area) change of gaze direction in adapting face stimuli could induce a dramatic reduction in the magnitude of face viewpoint aftereffect while vertical inversion of the face stimuli almost abolished the reduction.

Junzhu Su, and Hongjing Lu (2017) Flash-lag effects in biological motion interact with body orientation and action familiarity. Vision Research, 140: 13-24.  PMID: 28750748
Jeroen J. A. van Boxtel, Yujia Peng, Junzhu Su, and Honjing Lu. (2016). Individual differences in high-level biological motion tasks correlate with autistic traits. Vision Research, PMID: 27919678
Junzhu Su, Jeroen J.A. van Boxtel, and Hongjing Lu. (2016). Social interactions receive priority to conscious perception. PloS One, 11(8): e0160468. PMID: 27509028
Junzhu Su1, Qingleng Tan1, and Fang Fang. (2013). Neural correlates of face gender discrimination learning. Experimental Brain Research, 225(4): 569- 578. PMID: 23307160
Junzhu Su, Cheng Chen, Dongjun He, and Fang Fang. (2012) Effects of face view discrimination learning on N170 latency and amplitude. Vision Research, 61:125-131. PMID: 21911001
Taiyong Bi, Junzhu Su, Juan Chen, and Fang Fang. (2009) The role of gaze direction in face viewpoint aftereffect. Vision Research, 49: 2322 - 2327. PMID: 19607854

Conferrence Abstracts:
Junzhu Su, and Hongjing Lu. (2015, May). Action Prediction and the Flash-Lag Effect. Poster Presented at 15th Vision Sciences Society, St. Pete Beach, FL.
Jeroen J. A. van Boxtel, Junzhu Su, and Hongjing Lu. (2014, December). Social interactions receive priority access to conscious perception. Talk Presented at 10th Australasian Society for Cognitive Science
Conference, Melbourne, Australia
Junzhu Su, Jeroen J.A. van Boxtel and Hongjing Lu. (2014, May) “Meaningful actions and interactions receive priority in conscious perception”. doi: 10.1167/14.10.1251 Journal of Vision August 22, 2014 vol. 14 no. 10 article 1251. Poster Presentation at the 14th Vision Sciences Society, Florida, US
Junzhu Su, Jeroen J.A. van Boxtel and Hongjing Lu. (2013, May) “Action prediction and interaction enhances stimulus visibility during binocular rivalry”. doi: 10.1167/13.9.193 Journal of Vision July 24, 2013 vol. 13 no. 9 article 193. Poster Presentation at the 13th Vision Sciences Society, Florida, US
Junzhu Su, Jeroen J.A. van Boxtel and Hongjing Lu. (2012, May) “'What' and 'When' in Action Prediction”. doi: 10.1167/12.9.462 Journal of Vision August 13, 2012 vol. 12 no. 9 article 462. Poster Presentation at the 12nd Vision Sciences Society, Florida, US
Fang Fang, Junzhu Su, Cheng Chen and Dongjun He. (2011, May) “Perceptual learning induces fast processing and efficient representation of face”. doi: 10.1167/11.11.589 Journal of Vision September 23, 2011 vol. 11 no. 11 article 589. Poster Presentation at the 11st Vision Sciences Society, Florida, US
Junzhu Su, Cheng Chen, Dongjun He and Fang Fang. (2010, September) “Reduced N170 latency and Gamma power after perceptual learning of face view discrimination”. (Abstract) Proceedings of the 7th International Conference on Cognitive Science, Beijing, China
Junzhu Su, and Fang Fang. (2009, October) “Unconscious Ebbinghaus Illusion”. Poster presented at Workshop on Cognitive Science from Cellular Mechanisms to Computational Theories, Beijing, China