# Review of Studies on User Research Based on EEG and Eye Tracking
## 4 Application Scope
### Spatial Environment
#### 4.3.1 Public Navigation System  
The public navigation systems involve the comprehensive study of elements such as landmarks, terrain, commercial space, and public facilities in public areas. Through EEG and eye-tracking technology, the spatial layouts and spatial forms that users are interested in can be observed to provide positive theoretical guidance for the development of public culture and commercial spaces. In the study of spatial display, [PERSON] et al. [78] used eye-tracking technology to quantitatively analyze the visual attraction of different display methods in different types of spaces after the combination of cultural space and display mode. They revealed the cognitive rules of the constituent elements of cultural space. In a navigation system, [PERSON] [79] aimed at the problems of pedestrian organization and general design in underground public space design that urgently need to be solved, taking the underground public space of the Wuhan rail transit station and commercial complex as the research object. The impression ratio of spatial cognition of subjects in different underground space forms was analyzed with synchronous monitoring of eye tracking and EEG, especially \(\alpha\) and \(\beta\) waves that are highly related to wakefulness and reflect active thinking, attention, and problem-solving ability [80]. This study reasonably analyzed the system settings of underground public space planning and design, various facilities and signs, and effectively provided a reference for spatial design techniques and design theories.  
Research on user cognition and behavior in public spaces has played a significant role in the tourism industry, especially in the operation of tourist attractions and commercial development. [PERSON] et al. [81] used a new method of detecting tourist impressions from electroencephalogram (EEG) information, and calculated the impression ratio of subjects during journeys to tourist attractions based on alpha and beta waves measured by a portable EEG device. The study used a portable electroencephalogram (EEG) device and a corresponding sensing system, which is distinct from conventional EEG apparatuses commonly employed in laboratory settings. This device is specifically designed for wearable applications, with the electrodes being placed on the forehead and one ear. The system encompasses a portable EEG device and a smartphone interface, serving the purpose of impression rate detection derived from the EEG signals. Notably, the system is equipped with the capability to monitor the intensity of alpha and beta waves at a frequency of one measurement per second. This novel approach offers promising prospects for real-time EEG monitoring and assessment in various applied contexts, which provides effective suggestions for improving the tourist experiences of popular attractions. [PERSON] [82] studied the spatial and architectural elements of traditional villages and residences, collected records of the observation process of subjects using an eye tracker, and analyzed the attentional form of villages through visualized data such as gaze trajectory maps, heat maps, AOI interest maps, etc.