An Iterative, Mixed Usability Approach Applied to the Telekit System from the Danish TeleCare North Trial

Table 5

Usability findings from the think-aloud tests were classified into 12 themes. The table illustrates the themes and the presence of themes (yes/no) and provides examples of the usability findings from TA1 and TA2.

Themes	TA1	TA2	Examples from TA1	Examples from TA2
Habits	Yes	Yes	The users received the Telekit system half a year before and were offered education	The users read the questionnaire very superficially—they know what is going to happen in the subsequent step
Lack of curiosity	Yes	Yes	The users did not attempt to remember password and username	The users are not interested in using the message function for writing or sending messages; the users’ curiosity is not aroused
Information level	No	Yes		Users did not use the message menu because they do not know its function
The Telekitsystem—know how	No	Yes		The users know the different icons
Comfortable with the Telekit system	Yes	Yes	The users were satisfied with the functionalities of the Telekit system.; The users had no problems with navigation in the Telekit system	The users are not afraid of pressing the wrong key because they know that they always have a way out; the users are comfortable using Telekit
Usability problems	Yes	Yes	The users had difficulties obtaining a reaction from the touchscreen because of cold finger or long nails; The users had difficulties remembering username and password which prevented them from logging in	The users did not know how to pause the film; It was not easy to find the log-out button
Learnability	No	Yes		The users had no problems with the scroll function
System feedback	Yes	Yes	When the users pressed multiple times on the touchscreen, the Telekit system did not react to commands	The Telekit system’s speed was too slow, could be faster
Content of the Telekit system	Yes	Yes	For the experienced users, a more flexible system with les text material would work better	It was nice to be asked about COPD symptoms; There was doubt about the meaning of the icons
Measurements	Yes	Yes	When users pressed the touchscreen multiple times, this resulted in incorrect answers and measurements; Users made mistakes in the sequences of actions so that the measurements were taken too early or too late because of the location and naming of keys	The users place the blood pressure cuff incorrectly; The users start the weight with their feet easily
The Telekit design	Yes	Yes	Some users had difficulties identifying keys on the Telekit keyboard; The users had no problems with the scroll function	There was lack of validation when the users change password; The typography was appropriate
Relevance of the Telekit system	No	Yes		The users had brought the Telekit system to their doctor