Bao Truong, Ph.D.

Los Angeles, California, United States Contact Info
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More than knowledge, experience and skill, I undoubtedly believe that grit, mindset and…

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  • Los Angeles Tourism & Convention Board

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Publications

  • The Role of Attention in Eye Gaze Cuing Accuracy

    University of California, Irvine

    How accurately can humans infer the direction of another person’s gaze? To study this
    question, I presented viewers with images of faces that gazed at locations marked by grey
    spheres. Viewers had to respond as soon they could detect that one of the spheres turned
    black. This marked the appearance of the target. Viewers responded significantly faster
    when the face gazed at the target (congruent gaze) versus when the face gazed in the
    opposite direction of the target (incongruent…

    How accurately can humans infer the direction of another person’s gaze? To study this
    question, I presented viewers with images of faces that gazed at locations marked by grey
    spheres. Viewers had to respond as soon they could detect that one of the spheres turned
    black. This marked the appearance of the target. Viewers responded significantly faster
    when the face gazed at the target (congruent gaze) versus when the face gazed in the
    opposite direction of the target (incongruent gaze). The design of this study was based on
    a target-detection paradigm. Unlike target-detection paradigms from previous eye gaze
    research, I presented the target and locations in stereo and varied their position in
    direction and depth. The face stimuli varied in: (1) stereo-cuing (stereoscopic vs. nonstereoscopic)
    and (2) gaze direction (congruent vs. incongruent). I also varied facial
    attributes by: (1) rotating the face, (2) occluding either one of the eyes, (3) removing all
    of the facial features except for the eyes, and (4) reversing the contrast values of the
    colors in the face. Under certain conditions, viewers responded significantly faster when
    the target appeared on the left side of the display versus when the target appeared on the
    right side. This pattern implicated that subjects displayed a left visual field bias (LVF), a
    xiii
    phenomenon commonly associated with face processing. The LVF bias only occurred
    when: (1) the face had stereo cues, (2) the face was viewed frontally, (3) the face had
    both eyes exposed, and (4) the face remained gazed at the viewer before and after the
    target appeared. According to EEG studies, the facial attributes present during these
    effects were also attributes in that elicited the N170 response, a scalp recorded event
    related potential produced by the synchronous activation of the fusiform gyrus, superior
    temporal sulcus and occipital regions. Findings suggest that viewers infer gaze direction
    to locations in 3D by calculating a 3D vector from each

Languages

  • Vietnamese

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  • English

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