Using conversation analysis to explore the recurrence of a topic in the talk of a boy with an autism spectrum disorder.

Some higher functioning individuals with autism spectrum disorders (ASDs) are reported to produce perseverative talk, especially around 'special interests'. Topic perseveration is a form of pragmatic impairment captured in Prizant and Rydell's (1993) continuum of unconventional verbal behaviour in autism. Although widely reported, there is little systematic empirical research into this phenomenon. This paper considers the utility of Conversation Analysis in developing knowledge in this area, drawing upon data involving a boy with an ASD interacting with a researcher and a mobile robot platform. Although a frequency analysis of the boy's talk on a single topic may suggest that it is perseverative in nature, in a sequential analysis of both talk and non-spoken activities this study aims to show how these may be interactionally-embedded. It is suggested that, in considering the interactional salience of apparently perseverative talk, it can be useful to explore the participation framework in which the topic is revisited.