The User Interface Interaction Design of Central Bank Digital Currency: An Empirical Study

Abstract: It is certain that the Central Bank Digital Currency (CBDC) as the future direction of monetary development has become a general consensus among central banks around the world. Many studies have been conducted on the technical and macroeconomic implications of CBDC at the level of technology and macroeconomics. Nonetheless, there is a lack of research on the user interface design of CBDC. The purpose of this study focuses on evaluating the relationship between the font size layout of CBDC interfaces and user age. A 3 (font size) X 2 (user age) mixed factorial design was used to assess the impact of the relevant research variables on users' subjective evaluations. The experimental results showed that, firstly, younger users preferred CBDC interface designs with medium-sized fonts and older users preferred large-sized fonts. Secondly, this study also found that both older and younger users were biased towards disliking CBDC interface designs with small font sizes. In addition, this study found that CBDC user interfaces with large fonts had the strongest sense of security, while CBDC user interfaces with small fonts did not. It is worth noting that younger users feel that CBDC is a secure payment method more than older users. Finally, young users have the highest NPS net recommendation index for medium-sized fonts, and older users have a higher NPS net recommendation index for large-sized fonts. The above findings can be used as design guidelines for the issuance and design of CBDC for the relevant countries in the future, and have high academic and theoretical value as well.

Keywords: Central Bank Digital Currencies, User Interface Design, User Experience, Mobile Payments

DOI: 10.54941/ahfe1004223

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