The Time Course of Perceptual Closure of Incomplete Visual Objects: An Event-Related Potential Study

Abstract

Perceptual organization is an important part of visual and auditory information processing. In the case of visual occlusion, whether the loss of information in images could be recovered and thus perceptually closed affects object recognition. In particular, many elderly subjects have defects in object recognition ability, which may be closely related to the abnormalities of perceptual functions. This phenomenon even can be observed in the early stage of dementia. Therefore, studying the neural mechanism of perceptual closure and its relationship with sensory and cognitive processing is important for understanding how the human brain recognizes objects, inspiring the development of neuromorphic intelligent algorithms of object recognition. In this study, a new experiment was designed to explore the realistic process of perceptual closure under occlusion and intact conditions of faces and building. The analysis of the differences in ERP components P1, N1, and Ncl indicated that the subjective awareness of perceptual closure mainly occurs in Ncl, but incomplete information has been processed and showed different manners compared to complete stimuli in N170 for facial materials. Although occluded, faces, but not buildings, still maintain the specificity of perceptual processing. The Ncl by faces and buildings did not show significant differences in both amplitude and latency, suggesting a “completing” process regardless of categorical features.

A longitudinal study on the impact of high‐altitude hypoxia on perceptual processes

“…Half of them were male, and half were female. Adobe Photoshop was used to randomly occlude the whole picture, with an occlusion ratio of 50% for each picture (see Figure 2), which made the perceptual process more difficult (Liu et al., 2020). All the photographs maintained the same luminance and contrast values.…”

Development and Validation of Paradigms Based on the Global-First Topological Approach for Alzheimer’s Disease Severity Staging

“…Patients with AD exhibit visual perception deficits. 5 Multiple teams have attempted to stage the severity of AD through perceptual organization tasks 6,7 or visual working memory (VWM) paradigms across different dimensions (shape-color or color-position). [8][9][10] Despite the progress that has been made, only some paradigms incorporate graphic changes into the testing scope, and consider local geometric properties, such as collinearity and parallelism as primitives of visual representation, resulting in unclear patterns of graphic changes and difficulty in distinguishing their change attributes.…”