中文摘要：

为获取人机交互数字界面中图标元素生理评估的相关脑电成分和神经学依据，基于事件相关电位技术，采用改进的样本延迟匹配任务实验范式，研究在不同时间压力（4000 ms，2000 ms）和不同图标数量（3个图标，5个图标，10个图标）下图标记忆。实验结果表明：在图标认知过程中，P300有显著波幅差异，并在PZ 电极附近存在最大波幅；P200在 FCZ 附近有明显波幅变化；P300和 P200的波幅随任务难度的增加呈增大趋势；P300的潜伏期和任务难度呈现负相关现象。图标记忆特征的事件相关电位研究，对用户神经认知行为和界面可用性生理评估有非常重要的参考价值和指导意义。

英文摘要：

In order to obtain related brain electrical components and neural bases of physiology assessment of icon elements in a digital human-computer interface the modified sample-delay matching task experimental paradigm is used under different time pressures 4 000 and 2 000 ms and different icon quantities three five and ten icons on icon memory based on event-related potential ERP technology.Experimental results demonstrate that P300 has significant volatility changes and the maximum amplitude around the middle line of the parietal area PZ and P200 has obvious volatility changes around the middle line of the frontal and central area FCZ during icon cognition.P300 and P200 amplitudes increase as tasks become more difficult.Thus P300 latency is positively correlated with task difficulty. ERP research on the characteristics of icon memory will be an important reference standard in guiding user neurocognitive behavior and physiology assessment on interface usability.