The Effect of Light Mode and Dark Mode Features on Tablet applications for Thai elderly users
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Abstract
As the older Thai population are increasing to use mobile applications (such as Line, Facebook and so on) for accessing online information about goods and services (Electronic Transactions Development Agency (ETDA), 2019, 2020). However, elderly people still have some issues for the use of the web such as the text and background colours that did not have sufficient contrast. Although, there are a series of recommendations for a combination of text and background colours on the websites, but it is still lack of the recommendations for colour modes on mobile application which is different presentation from the recommendations of text and background colour. To provide the empirical evidence, this work conducted the effect of light mode (black on white) and dark mode (white on black) on tablet computers on task completion time, rating of reading and preferences for older Thai subjects. Thirty older Thais (60 to 73 years) participated in the study. Subjects performed four tasks on mobile applications which were presented in different colour modes (light mode and dark mode) via tablet computers and rated ease of reading and their preference after performing the tasks. The results show that all subjects completed their tasks. The colour mode had no significant effects on task completion time measures at a statistical significance of the 0.05 level. However, participants rated the light mode was significantly easier to read than the dark mode at 0.05 level. On preference for two colour modes, subjects expressed significant trends at 0.05 level, preferring the light mode which was black text and white background. These results show that the light mode is recommended for elderly Thai users in term of ease of reading and preferences. In addition, the researcher hopes these results can assist developers or designers of business mobile applications realize the elderly user needs.
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