The questionnaires revealed several properties that can be improved in the prototype.
Firstly the responses we received to the question concerning the size of the menus and text displayed showed that an increase in the size was necessary. John stated that the size was "Just Fine" while Ingrid found it "A bit small". For people like Ingrid this can become really annoying especially after a 30 minute shopping walk. The size of the menus and text has to be larger. Using capital letters might also make the system more usable.
Due to the 2-dimensional nature of the screen, buttons may not be as easy to distinguish especially for Ingrid who hardly has any experience with technology. Furthermore Ingrid is colorblind.
This has shown that the e-trolley user interface should clearly display buttons through intelligent use of colors and thick borders.
The original interface did not make it clear where to start. Although a modern user will intuitively know to look at the menus at the sidebar for guidance in the tasks he wishes to complete. But for the elderly this cannot be taken for granted. A clear sign must be given to indicate where to begin. This will be added to the next prototype that we create.
Finally our personas have made two suggestions regarding system functionalities:
a) The ability to perform keyword searches.
b) Provide the shopping list to view all items that have been selected.
c) Increase screen size
Firstly the responses we received to the question concerning the size of the menus and text displayed showed that an increase in the size was necessary. John stated that the size was "Just Fine" while Ingrid found it "A bit small". For people like Ingrid this can become really annoying especially after a 30 minute shopping walk. The size of the menus and text has to be larger. Using capital letters might also make the system more usable.
Due to the 2-dimensional nature of the screen, buttons may not be as easy to distinguish especially for Ingrid who hardly has any experience with technology. Furthermore Ingrid is colorblind.
This has shown that the e-trolley user interface should clearly display buttons through intelligent use of colors and thick borders.
The original interface did not make it clear where to start. Although a modern user will intuitively know to look at the menus at the sidebar for guidance in the tasks he wishes to complete. But for the elderly this cannot be taken for granted. A clear sign must be given to indicate where to begin. This will be added to the next prototype that we create.
Finally our personas have made two suggestions regarding system functionalities:
a) The ability to perform keyword searches.
b) Provide the shopping list to view all items that have been selected.
c) Increase screen size
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