Page 126 - THE DUTCH TALKING TOUCH SCREEN QUESTIONNAIRE

Chapter 4
problem had occurred with an average of more than one time per
participant.
This resulted in a 0-3 point score per problem. Each score was related to a level of severity: 0 = low, 1 = medium, 2 = serious and 3 = critical. These severity-ratings give an indication of which problems lead to disastrous usability problems and which problems are more cosmetic in nature [43]. This provides insight into whether or not the usability of the DTTSQ needs to be improved before it can be released. Nielsen and Loranger recommend to tackle only serious and critical severe problems during the development process of a digital tool. Low and medium severe problems do not have priority according to Nielsen and Loranger, because although they are bothersome, they are not likely to directly influence the usage of a tool. This makes it uninteresting to tackle them from a cost-benefit perspective. Serious and critical severe problems on the other hand can be so disrupting that they can make users stop using a tool or prevent them from even starting to use it at all. Therefore, they should not be ignored during the development process of a digital tool [41].
As a next step researcher MW started open coding of all fragments in the transcripts of the semi-structured interviews that were related to (dis)satisfaction about the ease of use of the questionnaire using Maxqda 10 of VERBI Software GmbH, Berlin. After she finished open coding she organized and structured the codes until a coding scheme emerged on the basis of which the part of the research question that was related to satisfaction of the participants could be answered sufficiently.
As a last step researcher MW ordered the analyzed data into three groups: data of participants who had (1) no, (2) little and (3) average/ high experience in using mobile technology. This was done to see whether or not data differed within and between these groups.
During the whole course of the study procedures, coding, analysis steps and interpretation decisions were discussed with researchers HW, MJW and WD.
Ethics
No external funding was received by the Utrecht University of Applied Sciences to conduct this study. This study was submitted to
120