ISSN 0439-755X
CN 11-1911/B
主办:中国心理学会
   中国科学院心理研究所
出版:科学出版社

心理学报 ›› 2026, Vol. 58 ›› Issue (12): 2631-2652.doi: 10.3724/SP.J.1041.2026.2631 cstr: 32110.14.2026.2631

• 研究报告 • 上一篇    下一篇

完整自我:完整线索提升自我优先性

夏瑞雪, 张乃文, 蒋云鹤, 周爱保   

  1. 西北师范大学心理学院; 甘肃省行为与心理健康重点实验室, 兰州 730070
  • 收稿日期:2025-12-08 发布日期:2026-10-29 出版日期:2026-12-25
  • 通讯作者: 夏瑞雪 E-mail: xiarx9391@nwnu.edu.cn; 周爱保 E-mail: zhouab@nwnu.edu.cn
  • 基金资助:
    国家自然科学基金地区科学基金项目(32360202)、2025年甘肃省高等教育教学改革研究重点项目(GJJGA037)资助

The complete self: Shape completeness enhances self-prioritization

XIA Ruixue, ZHANG Naiwen, JIANG Yunhe, ZHOU Aibao   

  1. School of Psychology, Northwest Normal University; Key Laboratory of Behavioral and Mental Health of Gansu Province, Lanzhou, 730070, China
  • Received:2025-12-08 Online:2026-10-29 Published:2026-12-25

摘要: 自我相关信息对人类的生存与发展意义重大。当前研究通过两个实验, 采用知觉匹配范式考察了完整/残缺形状对自我加工的影响。实验1的行为结果表明, 在匹配条件下, 与自我残缺关联和陌生人完整关联相比, 自我完整关联的反应时更快、正确率更高、响应标准更宽松; 且自我完整关联具有更快的信息摄取率和更短的非决策时间。ERP结果表明, 在匹配条件下, 与自我残缺关联和陌生人完整关联相比, 自我完整关联诱发了更小的N1、N2振幅以及更大的早期LPP振幅。实验2在排除关联规则切换的转换代价后, 自我完整关联仍表现出更快的反应时、更高的正确率、更高的知觉敏感性以及更宽松的响应标准。两个实验的结果提示, 在知觉决策过程中存在自我完整优势效应, 这为完整线索促进自我相关加工的优先性提供了实证依据, 拓宽了人们对自我优势效应边界条件的理解, 表明自我优势效应兼具稳定性与随自我相关刺激知觉特征调节的灵活性。

关键词: 完整线索, 自我优势效应, 漂移扩散模型, 事件相关电位

Abstract: Self-relevant information is crucial for human survival and development. Previous studies have shown that the congruence between the implicit meanings of stimuli and the self-concept can facilitate the processing of self-related information, suggesting that self-cognition may be shaped and activated through implicit associations within dynamic environmental contexts. In the Chinese cultural context, completeness is often associated with integrity, unity, and perfection, serving as a meaningful implicit backdrop for examining how concrete perceptual features are linked to abstract self-cognition. However, it remains unclear whether complete shapes, as concrete perceptual cues, can further enhance the processing advantage for self-related information through implicit associations. Therefore, the present study investigated whether shape completeness modulates self-prioritization in perceptual decision-making. We hypothesized that associations between self-referential labels and complete shapes would receive preferential processing, resulting in a self-complete association advantage.
The present study comprised two experiments. Experiment 1 employed a 2 (Shape Completeness: complete, incomplete) × 2 (Encoding: self-related, stranger-related) × 2 (Match Type: match, mismatch) within-subjects design, combining hierarchical drift diffusion modeling and event-related potential techniques to investigate the impact of shape completeness on self-related processing and its underlying cognitive and neural mechanisms. Participants completed a perceptual matching task involving two phases. During the associative phase, they learned associations between two geometric shapes (i.e., complete and incomplete shapes) and two identity labels (i.e., self and stranger). In the subsequent shape-label matching phase, participants judged whether each presented shape-label pair matched the previously learned associations. Thirty-five college students participated in Experiment 1, and valid data from 30 participants (22 females, 8 males) were retained for analysis. EEG data were recorded from 64 scalp sites according to the standard international 10-20 system. The ERP components N1, P2, N2, early LPP, and late LPP were analyzed as indices of different temporal stages underlying the influence of shape completeness on self-related processing. Experiment 2 utilized a 2 (Group: self-complete/stranger-incomplete rule, self-incomplete/stranger-complete rule) × 2 (Encoding: self, stranger) × 2 (Match Type: match, mismatch) mixed design. Sixty college students (18 males, 42 females) were recruited and randomly assigned to two groups of 30 each. In this non-reversal design, each participant was assigned only one fixed identity-shape association, thereby excluding potential confounding effects from rule switching.
The behavioral results of Experiment 1 revealed a stable self-prioritization effect: compared with stranger-related associations, self-related associations yielded shorter response times, higher accuracy, greater perceptual sensitivity, and lower response criteria. In addition, a completeness advantage was observed, such that complete-shape associations were processed more efficiently than incomplete-shape associations. More importantly, on match trials, self-complete associations exhibited shorter response times, higher accuracy, and lower response criteria than both stranger-complete and self-incomplete associations, indicating a specific processing advantage for self-complete associations. The hierarchical drift diffusion modeling results further indicated that this self-complete association advantage was supported by a faster evidence accumulation rate and shorter non-decision times. The ERP results showed that, compared with self-incomplete and stranger-complete associations, self-complete associations elicited reduced N1 amplitudes in the 80-130 ms time window, attenuated N2 amplitudes at 250-350 ms, and larger early LPP amplitudes at 450-650 ms. Given that the N1 effect may be jointly modulated by block-level mapping rules and condition-related factors, the N1 finding was interpreted cautiously as an early processing difference specific to self-complete associations. Experiment 2 demonstrated that the self-complete association advantage persisted without rule reversal, indicating that this effect was not attributable to switching costs arising from rule changes.
Taken together, these results demonstrate that self-prioritization is not only reflected in the baseline preferential processing of self-related stimuli but is also modulated by the congruence between perceptual features and the self-concept. Complete-shape cues enhanced the processing priority for self-related associations, indicating that complete shapes may facilitate self-related processing by increasing the compatibility between perceptual completeness and the self-concept. This conclusion is corroborated by behavioral, diffusion-modeling, and ERP evidence, revealing that the self-complete association advantage involves faster evidence accumulation, shorter non-decision times, early processing differences, and enhanced late-stage attentional integration.

Key words: completeness cue, self-prioritization effect, drift diffusion model, ERPs

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