Abstract
Body function begins to decline in middle age, with changes becoming increasingly noticeable over time. With the popularization of educational and information technology, people know more about healthcare and are becoming accustomed to self-testing using health equipment. Technological changes are reflected in products, which present innovations including the switch from traditional to touch-controlled interface designs. This can cause difficulties in the interpretation and interface operation for older adults, who may be facing physiological and psychological alterations. Understanding users’ physiological limitations has become an important aspect of product design. This study explored the effects of physiological limitations on touch-screen operation in middle-aged and elderly people, specifically regarding button type, display position, and button size. A total of 64 participants were included in the study: 32 middle-aged people (aged 45–64 years) and 32 elderly people (65 years of age and older). Each participant was asked to complete 32 tasks (two button categories × four button sizes × four presentation positions). The results revealed no differences between the elderly and the middle-aged groups with regard to the interpretation of image buttons and text buttons; however, button size affected the operation and interpretation time. Middle-aged participants demonstrated good interpretation performance when the buttons were displayed in the upper or lower part of the screen, whereas elderly participants only had a good interpretation performance when the buttons were in the upper part. For both groups, the ideal image button size was 16 mm with a text font size of 22.
Highlights
IntroductionThe elderly population increased each year, while the younger population decreased due to a decline in fertility, leading to the phenomenon of population aging
This study explored the effects of physiological limitations on touch-screen operation in middle-aged and elderly people, regarding button type, display position, and button size
A total of 64 participants were included in the study: 32 middle-aged people and 32 elderly people (65 years of age and older)
Summary
The elderly population increased each year, while the younger population decreased due to a decline in fertility, leading to the phenomenon of population aging. This will become a major social problem for Taiwan in the future. According to Gay, Mills, and Airasian [45], a minimum of 30 subjects are required for comparative subjects aged between 45 and 64 years (mean: 54.12; SD = 7.54) and 32 subjects aged 65 years and and relationship studies. A total of 64 participants were recruited for the study: 32 subjects aged above (mean: 70.59; SD = 3.62). The inclusion criteria were the following: familiar with using touch technology acuity over 0.8 and no major visual dysfunction (color blindness, amblyopia, blindness);
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