The present research evaluates the effectiveness of CymaSense, a real-time 3D visualisation application developed by the authors, as a means of improving the communicative behaviours of autistic participants through the addition of a visual modality within therapeutic music sessions. Autism spectrum condition (ASC) is a lifelong neurodevelopmental disorder that can affect people in a number of ways, commonly through difficulties in communication. A multi-sensory approach within music sessions encourages people with ASC to engage more with the act of creating music, and with the therapists, increasing their level of communication and social interaction beyond the sessions.
This article presents a study evaluating the use of CymaSense within a series of therapeutic music sessions, and a follow-up series of semi-structured interviews. Eight adults with ASC participated in 12 sessions using a single case experimental design approach over a total period of 19 weeks. Using qualitative and quantitative data, the results show an increase in communicative behaviour, for both verbal and non-verbal participants, resulting from the use of CymaSense. Qualitative feedback from interviews provided insight into the factors that contribute to the successful use of the application, as well as aspects that could be improved.
In this article, we introduce recently released, publicly available resources, which allow users to watch videos of hidden articulators (e.g. the tongue) during the production of various types of sounds found in the world's languages. The articulation videos on these resources are linked to a clickable International Phonetic Alphabet chart ([International Phonetic Association. 1999. Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet. Cambridge: Cambridge University Press]), so that the user can study the articulations of different types of speech sounds systematically. We discuss the utility of these resources for teaching the pronunciation of contrastive sounds in a foreign language that are absent in the learner's native language.
This paper describes an experiment that investigates new principles for representing hierarchical menus such as telephone-based interface menus, with non-speech audio. A hierarchy of 25 nodes with a sound for each node was used. The sounds were designed to test the efficiency of using specific features of a musical language to provide navigation cues. Participants (half musicians and half non-musicians) were asked to identify the position of the sounds in the hierarchy. The overall recall rate of 86% suggests that syntactic features of a musical language of representation can be used as meaningful navigation cues. More generally, these results show that the specific meaning of musical motives can be used to provide ways to navigate in a hierarchical structure such as telephone-based interfaces menus.
Users gain access to cash, confidential information and services at Automated Teller Machines (ATMs) via an authentication process involving a Personal Identification Number (PIN). These users frequently have many different PINs, and fail to remember them without recourse to insecure behaviours. This is not a failing of users. It is a usability failing in the ATM authentication mechanism. This paper describes research executed to evaluate whether users find multiple graphical passwords more memorable than multiple PINs. The research also investigates the success of two memory augmentation strategies in increasing memorability of graphical passwords. The results demonstrate that multiple graphical passwords are substantially more effective than multiple PIN numbers. Memorability is further improved by the use of mnemonics to aid their recall. This study will be of interest to HCI practitioners and information security researchers exploring approaches to usable security.
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