UX (User experience) can influence important user behaviors, including user preference, purchasing decisions, and customer loyalty. The ability to assess UX during the product trial has practical significance for design and improvement of products. In this article, two smartphones with different UX were selected through a focus group. In the EEG (electroencephalography) experiment, we explored the brain signal of users when using two smartphones to complete three tasks. The brain signal of each participant was recorded through Curry Neuroimaging Suite software (Version 7.0, Compumedics Limited, Abbotsford, Australia) when they were using the smartphones. Then results from behavioral, subjective and neural responses were analyzed. The behavioral results showed that participants completed the three tasks faster by using a smartphone with a higher score of UX. The subjective results showed a significant difference between the two smartphones. The patterns of cortical activity were obtained in the five principal frequency bands, Delta (1–4 Hz), Theta (4–8 Hz), Alpha (8–13 Hz), Beta (13–30 Hz) and Gamma (30–45 Hz). The results indicated that a smartphone with higher scores of UX could evoke stronger relative power of Alpha (fronto-central, parietal and partieto-occipital regions), Delta (frontal region) and Gamma rhythms (C3 site), but weaker relative power of Beta (left central region) and Theta rhythms (frontal and parieto-occipital regions). Also, the correlation analysis showed that there was no significant relationship between EEG and behavioral results. User’s subjective experience had a significant positive correlation with the relative power of Gamma band, but a negative correlation with Beta and Theta bands (approximately significant with p = .078 and p = .071). There were also significant correlations between EEG results and sub-items of UX. Our findings suggest that the difference in EEG may be taken as an evaluating indicator of user perception when using products without interruption.

UX（用户体验）可以影响重要的用户行为，包括用户偏好，购买决策和客户忠诚度。在产品试用期间评估UX的能力对于设计和改进产品具有实际意义。在本文中，通过焦点小组选择了两台具有不同UX的智能手机。在EEG（脑电图）实验中，我们探索了使用两部智能手机完成三项任务时用户的大脑信号。当他们使用智能手机时，通过Curry Neuroimaging Suite软件（Version 7.0，Compumedics Limited，Abbotsford，澳大利亚）记录了每个参与者的大脑信号。然后分析了行为，主观和神经反应的结果。行为结果表明，参与者使用具有更高UX分数的智能手机可以更快地完成这三个任务。主观结果显示两款智能手机之间存在显着差异。在五个主要频带中获得了皮层活动的模式，分别是Delta（1-4 Hz），Theta（4-8 Hz），Alpha（8-13 Hz），Beta（13-30 Hz）和Gamma（30- 45 Hz）。结果表明，具有较高UX分数的智能手机可以唤起较强的Alpha（额中，顶叶和顶枕区），Delta（额叶区）和Gamma节奏（C3部位）的相对功率，但Beta的相对功率较弱（左中部区域）和Theta节律（额叶和顶枕区域）。而且，相关分析表明，脑电图与行为结果之间没有显着关系。p = .078和p = .071）。EEG结果与UX子项目之间也存在显着相关性。我们的发现表明，使用不间断的产品时，EEG的差异可作为用户感知的评估指标。