Sada is an interactive multimedia program for auditory discrimination therapy in the Arabic Language. Sada was designed to extend speech therapy beyond clinical settings and provide patients with a computerbased therapy system which can be used between sessions with speech therapists; at school or at home on an 'on-demand' basis. The program provides local Arabic dialects and a configurable knowledge-base which allows for extending the therapy and customizing the pronunciation of words for different Arabic-speaking populations. The Sada architecture and its interaction design are described and the advantages of computer-based therapy for auditory perceptual problems are discussed.

Usability engineering and usability testing are concepts that continue to evolve. Interesting research studies and new ideas come up every now and then. This paper tests the hypothesis of using an EDA-based physiological measurements as a usability testing tool by considering three measures; which are observers' opinions, self-reported data and EDA-based physiological sensor data. These data were analyzed comparatively and statistically. It concludes by discussing the findings that has been obtained from those subjective and objective measures, which partially supports the hypothesis.

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