User Study And Interface Design For P2P Mobile Payment

In recent years, the concept of mobile Internet, electronic currency and mobile pay-ment is developing rapidly, and the requirements of consumption quality is increasing day by day, but the disadvantages that traditional payment have, such as cash is difficult to carry, people have to accept change during transactions, if we want to use cards, we should ask the infrastructure support, also the coverage is not wild enough. They are all influence the quality of consumption. By literature review, the author found that the P2P mobile payment based on NFC will be the most potential payment. It is a mobile applic-ation service, and through the phone’s built-in NFC module, it can finish data transmiss-ion and exchange. If we want to deal, only we should do is putting two mobile phones close to a certain distance, and impose the restriction of time and place. Therefore, the author puts forward the P2P mobile payment based on NFC technology as the research subject.This research work is divided into five stages, including literature investigation, r-equiements accessing & analysis, concept design and confirmation, interaction design & interface design, programming and evaluation. First, the author studied and summarized the literature of related field; Secondly, this paper takes the college students as the main target user group, through the user-centered design research methods like focus group, questionnaire, and participatory design, we extracted the requirement and ideal interacti-ve process about this new payment way; Again, according to Interview, participated de-sign and card sorting, we recognize the interactive process and information architecture, also, we show the solution by sketch, paper prototype and high-fidelity prototype, and through the iterative design, we improved the prototype.; Finally, according to the high-fidelity prototype, the author finished the code realization and evaluation basing on the Android development platform and take the HTC magic G2 and HTC desire HD A9191 as the experimental machine.Through the whole research, the authors regard the questions "whether users wil-ling to accept this new type of payment", "what about the user experience of the P2P mobile payment system" as the research topics. According to the research results:85% of users express that they will use it; for novice users, they can finish the tasks within 1.5 minutes and 0.5 times per person, the average task completion rate is 95.8%; The a-verage score of NASA-TLX is 1.98, which demonstrate that the work load is low; The average score of satisfaction questionnaire is 3.99, which shows that users sing high pr-aise for the P2P mobile payment system, and they are very satisfied with it.