Approaching the Preference of Senior Citizens for Mobile Photographs by the Methods of EGM and William DuMouchel’s Continuous Kano Model

This study aims to explore the purposes and motivations of seniors using mobile photography and the preferences they get from it. The researchers took senior citizens who use mobile photography as the research object and used the evaluation grid method (EGM) to conduct in-depth interviews and questionnaires to investigate the emotional reactions and social interactions of this group when participating. After inductive analysis, the study identified the important factors and reasons that influence mobile photography as a leisure preference, summarized the important preferences and ideas of people using mobile photography in leisure activities, and integrated credible evaluations and opinions. It was found that the elderly use mobile photography for the main motivation of recording, and for the main purposes of leisure activities, selfies, photo editing software, getting to know new things and new friends, and uploading to social platforms to share, gaining a sense of happiness from mobile photography. In addition, unlike the traditional discrete Kano model, which is prone to losing certain information and resulting in increased data instability, William DuMouchel’s continuous Kano Model analysis is used to observe the senior citizens’ evaluation of mobile phone quality factors, while using satisfaction as a weighting factor. The Better coefficient reflects changes in satisfaction among the elderly with the presence of a certain function. It is hoped that this research method can provide a further understanding of the needs of the elderly for mobile photography, and at the same time provide a reference for the future promotion of mobile photography among the elderly.