Improving Spelling Skills for Blind Language Learners - Orthographic Feedback in an Auditory Vocabulary Trainer

This paper describes the design and the design process of orthographic feedback in a computer-assisted vocabulary learning (CAVL) application that is targeted at blind language learners. It discusses current research findings of vocabulary and spelling acquisition, as well as special needs of blind computer users. CAVL applications often assume the user’s sightedness. While it is possible for blind users to access software via screen reader or Braille line, it is argued that orthographic feedback does not translate one-to-one from visual-toauditory (or tactile). To overcome this short-coming and thus ensure high usability for blind users, the feedback may be designed differently to be delivered via the auditory channel. Following a user-centered design approach, the orthographic feedback in an auditory vocabulary trainer is constructed and evaluated iteratively with users. The preliminary architecture that evolved out of these pre-studies is reported and discussed. In conclusion, an outlook is given as to how the final architecture will be implemented and evaluated.