Junjun Zhang

University of California, Irvine, Irvine, California, United States

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Publications (8)12.6 Total impact

  • Weina Zhu · Junjun Zhang · Changle Zhou
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    ABSTRACT: Closure or the presence of a “hole” is an emergent perceptual feature that can be extracted by the visual system early on. This feature has been shown to have perceptual advantages over openness or “no-hole”. in this study, we investigated when and how the human brain differentiates between “hole” and “no-hole” figures. Event-related potentials (ERPs) were recorded during a passive observation paradigm. Two pairs of simple figures (Experiment 1) and two sets of Greek letters (Experiment 2) were used as stimuli. The ERPs of “hole” and “no-hole” figures differed ∼90 ms after stimulus onset: “hole” figures elicited smaller P1 and N1 amplitudes than “no-hole” figures. These suggest that both P1 and N1 components are sensitive to the difference between “hole” and “no-hole” figures; perception of “hole” and “no-hole” figures might be differentiated early during visual processing.
    No preview · Article · Feb 2012 · Neuroscience Bulletin
  • Weina Zhu · Dan Xu · Junjun Zhang · Yuanye Ma · Changle Zhou · Lun Zhao
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    ABSTRACT: This study want to find electrophysiological evidence to test whether face capture more attention than object, and whether the attention capture of face automatically or controllably. Fifteen subjects were tested on a three-stimulus visual oddball task, in which faces and objects as distractor stimuli were presented in different blocks separately. Face as task-irrelevant stimuli elicited earlier, greater and frontal-distributed P3a, which suggests that faces can faster capture more attention than object automatically. And we infer that face and object as distractor stimuli are processed in different brain mechanisms.
    No preview · Conference Paper · Aug 2010
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    Weina Zhu · Junjun Zhang · Xiaojun Ding · Changle Zhou · Yuanye Ma · Dan Xu

    Full-text · Article · May 2010 · Neuroscience Letters
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    ABSTRACT: According to Chen's theory, topological differences are perceived faster than feature differences in early visual perception. We hypothesized that topological perception is caused by the sensitivity in discriminating figures with and without "holes". An ERP experiment was conducted utilizing a passive paradigm to investigate the differences in perceiving figures with "hole" and with "no-hole". The results showed differences in N170 components between figures with "holes" and with "no-holes". The inversion of the "hole" could influence the latency of N170, but the inversion of the "no-hole" could not, which indicated that global features are processed first in the "hole" perception whilst local features are given priority to the "no-hole" perception. This result was similar to studies concerning face and non-face objects, suggesting a configural processing of the "hole".
    No preview · Article · Dec 2009 · Science in China Series C Life Sciences
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    Weina Zhu · Junjun Zhang · Xiaojun Ding · Changle Zhou · Yuanye Ma · Dan Xu
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    ABSTRACT: To compare the effects of music from different cultural environments (Guqin: Chinese music; piano: Western music) on crossmodal selective attention, behavioral and event-related potential (ERP) data in a standard two-stimulus visual oddball task were recorded from Chinese subjects in three conditions: silence, Guqin music or piano music background. Visual task data were then compared with auditory task data collected previously. In contrast with the results of the auditory task, the early (N1) and late (P300) stages exhibited no differences between Guqin and piano backgrounds during the visual task. Taking our previous study and this study together, we can conclude that: although the cultural-familiar music influenced selective attention both in the early and late stages, these effects appeared only within a sensory modality (auditory) but not in cross-sensory modalities (visual). Thus, the musical cultural factor is more obvious in intramodal than in crossmodal selective attention.
    Full-text · Article · Sep 2009 · Neuroscience Letters
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    ABSTRACT: Global information is considered the primitive of visual perception in Gestalt psychology. Further, L. Chen (2005) proposed a new theory of topological visual perception. According to this theory, the perception of topological difference is faster than other feature differences. However, it is still not clear why topological perception has the priority. Based on previous studies, we hypothesize that it is caused by the different perception between figures with "hole" and figures without "hole" in the primitive of vision. In the present paper, four behavioral experiments and one ERP experiment were presented. Four behavioral experiments utilizing backward masking paradigm demonstrated that under the same masking effect, "hole" was easier perceived than "no hole". The ERP data may suggest that feedback connection in visual ventral pathway is disturbed by backward masking for "no-hole" stimuli, while it almost remains the same for "hole" stimuli. We suggest that temporal visual cortex is sensitive to "hole", thus facilitating the feedback connection to the occipital cortex. That is one of the reasons why topological perception is prior to local perception.
    Full-text · Article · Aug 2009 · Journal of Vision
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    ABSTRACT: In the present study, the effects of Mozart's sonata K.448 on voluntary and involuntary attention were investigated by recording and analyzing behavioral and event-related potentials (ERPs) data in a three-stimulus visual oddball task. P3a (related to involuntary attention) and P3b (related to voluntary attention) were analyzed. The "Mozart effect" was showed on ERP but not on behavioral data. This study replicated the previous results of Mozart effect on voluntary attention: the P3b latency was influenced by Mozart's sonata K.448. But no change of P3a latency was induced by this music. At the same time, decreased P3a and P3b amplitudes in music condition were found. We interpret this change as positive "Mozart effect" on involuntary attention (P3a) and negative "Mozart effect" on voluntary attention (P3b). We conclude that Mozart's sonata K.448 has shown certain effects on both involuntary attention and voluntary attention in our study, but their effects work on different mechanisms.
    No preview · Article · Apr 2008 · Neuroscience Letters
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    Junjun Zhang · Changle Zhou
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    ABSTRACT: Recent experiments suggest a new theory on the neural mechanism of attention, namely biased competition hypothesis. In the previous work, models of this hypothesis are always built on neural representation using local coding scheme. In this paper, by using another neural coding strategy, we propose a model based on a distributed chaotic neural network. We show that the collective behavior of our model can also exhibits the characteristics of the hypothesis
    Full-text · Conference Paper · Nov 2005

Publication Stats

21 Citations
12.60 Total Impact Points


  • 2012
    • University of California, Irvine
      • Department of Cognitive Sciences
      Irvine, California, United States
  • 2008-2010
    • Xiamen University
      • School of Information Science & Technology
      Amoy, Fujian, China