Applying Usability Test to Find the Interface Design Principle of HRV Device for Senior Users
Hsin-Chang Lo, I-Jen Sung, Yu-Ting LinAbstract
Home use medical
device industry prospers due to the ageing society. In both
physiological and psychological domain, home use medical devices have
received much attention in recent years. Seniors usually feel depressed
or anxious because of losing health and living abilities. They can use
the heart rate variability (HRV) device in analyzing their emotional
response, however the interface of commercial HRV devices are not easy
for them to operate. Therefore, the usability test of these devices was
introduced for the senior users. Five senior user were recruited to
conduct usability test of the two commercial HRV devices: ANSWatch
(Taiwan Scientific Corp.) and CheckMyHeart Handheld HRV (DailyCare
BioMedical Inc.) follow the typical operation task. Then the in-depth
interview were conducted to find operational failure factors. All of
senior users indicated that the serious failure factors are: “unable to
understand English instructions” and “unable to determine the meaning of
illustration”. Four of them indicated that the minor ones are: “no
appropriate guide”; “text is too small”; and “layout is not
appropriate”. Three of them indicated that “illustration surface
reflection” is another problem. Therefore, we suggests that the home use
HRV device interface design should consider principles such as (1) the
language and icon properties, (2) step guides and text properties, (3)
consistency of interface configuration, (4) color scheme to improve the
operational satisfaction for the senior users.
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