Page 133 - THE DUTCH TALKING TOUCH SCREEN QUESTIONNAIRE

Evoluation of the Dutch and Turkish version
instructions, accentuate the activated response items and improve the user interface of question 4 by giving participants a complete overview of activities to choose from in one screen, without having to use complicated navigation functions.
DISCUSSION
Principal Results
All participants within this study were very satisfied with the ease of use of the DTTSQ. Nine participants stated that the usability of the application exceeded their expectations. The participants who had no experience with using mobile technology completed the prototype of the DTTSQ less effectively and efficiently than the little - and average/high experienced participants did. In the group of average/ high experienced participants only one problem was encountered in total, while the non-experienced participants encountered an average of three and the little experienced an average of two problems per person. Thirteen different kind of problems were encountered during this study. From a cost-benefit perspective four of these problems will need to be addressed during future development of the DTTSQ, because they have the potential to influence the future usage of the tool negatively [41]. The four problems that need to be addressed are: problem 1 ‘Accidently skipping a screen by double tapping on the next button’, problem 5 ‘Touching the text underneath a photo in question 4 to select an activity instead of touching the photo itself causing the activity not to be selected’, problem 8 ‘Pushing too hard or tapping too soft on the touch-screen causing the touch screen not to respond’ and problem 9 ‘Not able to correct a wrong answer’. Participants also recommended to shorten the length of the instructions and improve the user interface of question 4 by giving participants a complete overview of activities to choose from in one screen, without having to use complicated navigation functions.
Comparison with Prior Work
In earlier studies talking touchscreens were found to be easy to use for people with different levels of education, literacy or digital skills. These conclusions were based on study participants’ level of satisfaction with the ease of use of the tool [44,45] or on results on satisfaction combined with the efficiency with which the tool was completed [46- 50]. Effectiveness was not, or in case of Vargas et al. very slightly
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