# A Methodology to Evaluate User Experience for People with Autism Spectrum Disorder
## 7 Conclusions  
Studies have evaluated the UX and/or usability of their technological proposals through various evaluation methods and instruments, with the support of experts in ASD, people with ASD and their parents and/or tutors. Many of the evaluation methods and/or instruments used are not particularized or do not consider the characteristics of people with ASD. The investigations do not provide enough detail of the evaluations carried out [6]. It is necessary to have evaluation methods and instruments that consider the characteristics of people with ASD, with a special emphasis when these methods and instruments are executed with people with ASD; therefore, a formal process when evaluating the UX of systems, products or services used by people with ASD is needed. We have followed a seven-stage process for the creation of the methodology to evaluate the UX of systems, products or services used by people with ASD. This process is backed up by (1) the publication of a systematic literature review [6], which represents a justification for the need of a formal evaluation process, (2) the creation of nine UX factors for people with ASD [10], that has supported the characterization the users, and particularization of evaluation methods, instruments and processes aimed at evaluating UX in systems, products or services used by people with ASD, and (3) the publication of a first iteration of the creation process that resulted in a preliminary proposal of the methodology [11]. Two validations were made to the preliminary proposal of the methodology [11]. Experts with knowledge in UX/Usability, in the ASD condition, and in both, have provided us with comments and suggestions. Many of the comments and suggestions made were considered. In the first validation, a greater specification of the methodology has been refined and provided, as well as the creation of the substage S1.2 (Experiment Design). In the second validation, modifications were made mainly in substage S2.3 (User Tests) and a restructuring of stage S3 (Results Analysis Stage). Considering the results of the two validations carried out (two iterations in the creation process), we can highlight that the proposed methodology is perceived by the experts as useful, a contribution to the inclusion of people with ASD and, furthermore, they mention having the intention of using it in the future. The proposed methodology establishes a formal process to evaluate the user experience in systems, products and services used by adults with ASD, which includes evaluation methods, instruments and processes that were selected and adapted according to the specific characteristics of the users. Using the proposed methodology with an adequate selection or adaptation of instruments, such as those recommended in this paper, can help to improve the satisfaction and perception of people with ASD about the system, product or service evaluated. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Comment** & **Has Been Considered?** & **Justification/Action** \\ \hline The number of evaluators should be as proposed & & The suggestion has been included in substage \\ by [PERSON] and [PERSON] [38]. & & S1.3, evaluators selection. \\ \hline The methodology should consider the dependency & & This suggestion has been included in S1 \\ and/or autonomy of people with ASD. & & planning stage. \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Results of question O5. We believe that this methodology proposal contributes to solving the need for a formal process to evaluate the UX of systems, products or services used by people with ASD identified in the early stages of this investigation. By using this methodology, investigators will be able to follow a validated process that uses specific methods and instruments that were selected and adapted according to the needs of people with ASD, and by identifying and addressing the potential UX problems found, and the UX of the system, product or service can be improved, thus helping in providing a positive and rewarding experience for users with ASD.