# Usability and Acceptance Analysis of Wearable BCI Devices
## 6 Conclusions  
Thus, hooded EEG devices offer several advantages over rigid EEG devices, making them the preferred choice in many applications, although the formal design of rigid devices is generally more popular. The main difference is in comfort and ease of use. EEG headsets are generally lighter and more flexible, allowing them to better conform to the shape of the user's head and reduce discomfort during prolonged use. This is particularly important in clinical or research settings where participants may need to wear the device for prolonged periods of time. In addition, the flexibility of the textile headset allows for better contact of the electrodes with the scalp, ensuring more stable and accurate signal detection even with slight head movements. Crown devices are also easy to put on and take off, reducing the time needed to prepare participants and increasing the efficiency of recording sessions. The combination of comfort, ease of use, and signal quality makes textile headsets particularly suitable for long-term studies, applications in dynamic environments, and situations where minimizing user discomfort is essential for reliable and accurate results. These characteristics have a significant impact on the mechanical controls, the HW and SW system, and the overall form factor. This review opens up new opportunities for future research into the configuration of hybrid systems that combine the advantages of hooded and rigid layouts. Hybrid solutions may offer the best possible compromise between the signal quality required for accurate neuroimaging, user comfort, and adaptability to different head sizes and shapes. Also, improving the design methods of the neuroimaging headset is still an important issue, especially in medical and professional settings, where adoption is influenced by different standardizations. Their practical use could be greatly enhanced by addressing the issues of long-term wearability, durability, and ease of maintenance while maintaining adaptability in a variety of use cases.  
Therefore, the design process of the device intended for direct consumer use should consider and optimize general usability factors, including overall weight and adaptability, clarity and operational accuracy, interoperability with other technology and software, user comfort, and aesthetics. In addition, it is necessary to ensure good fixation of the scalp and skin electrodes to reduce contact impedance, thereby improving signal-to-noise ratio and providing valid and reliable data. To date, therefore, no device has been found on the market that meets the usability requirements identified for the design of neuroimaging systems and that can be used in different areas, from industrial to personal.  
Figure 6: **(i)** UHB and **(ii)** Diadem ICA components; the colors go to red (high noise) to blue (low noise).  
**Author Contributions:** [PERSON], G.G., S.C., V.P.S. and M.B.--Conceptualization, methodology, and investigation. All authors have contributed to the definition of conclusions. V.P.S.--Writing the introduction; S.C.--Writing the second section; G.G.--Writing the fourth and fifth sections; I.L.--Writing the third and fifth sections, review and editing, visualization; S.C., V.P.S. and M.B.--validation. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research received no external funding.  
**Institutional Review Board Statement:** The study was conducted in accordance with the Declaration of Helsinki.  
**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.  
**Data Availability Statement:** The data presented in this study are available on request from the corresponding author. The data are not publicly available due to privacy restrictions.  
**Acknowledgments:** Experimentation activities in collaboration with the Medical Robotics Laboratory of the University of Malaga.  
**Conflicts of Interest:** The authors declare no conflicts of interest.