Page 135 - THE DUTCH TALKING TOUCH SCREEN QUESTIONNAIRE

Evoluation of the Dutch and Turkish version
tool is ready to be released for average/high experienced, but not for less experienced future users. To be able to evaluate the worth of including potential future users at risk of exclusion it would be interesting to be able to compare data on efficiency and effectiveness of talking touchscreens that have been developed earlier. Specifically, because the user-interface and structure of the DTTSQ differs from comparable tools. For instance, the screen of the DTTSQ contains less buttons and operation functions, it does not have a back function, it provides summaries of given answers regularly to the respondent and questions are not automatically read out loud. In addition the design and format of the answer options in the earlier developed talking touchscreens [44-50] does not match the recommendations given by the low literate people that helped to design the DTTSQ [31]. If it would be possible to compare results on effectiveness from the tests of several different kind of talking touchscreens, a lot of insight could be gained in what does and does not work in striving for inclusive design for less skilled users of such tools.
According to Frokjaer et al. relations between the three aspects of usability depend in complex ways on the application domain, use context and user’s experience [34]. User’s experience may well have been of influence on the satisfaction outcomes of the current study. Eighty-three percent of the total study population had no or little experience in using mobile technology (see table 1 and 2). Limited or no user experience may have caused a form of computer anxiety, resulting in low self-efficacy, which in its turn led to low expectations towards the ease of use of the DTTSQ [51]. Nine out of the twenty- four participants in the current study explicitly stated that operating the DTTSQ was easier than they had expected beforehand. The other participants did not explicitly state this, but their statements on the ease of use could easily be interpreted as such. No participant stated or gave the impression that the ease of use of the DTTSQ was lower than they would have expected. According to the Expectation Confirmation Theory [52] actual performance exceeding the expectations of testers leads to satisfaction among these testers. The more their expectations are exceeded the more satisfied testers will become. Due to the limited user experience of most of the study participants, expectations towards the ease of use of the DTTSQ may have been low, which may have made it easier to exceed them. Especially considering that the DTTSQ was specifically designed to be easy to use for low educated
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