The PI is Christos Salis, Reading University. Aphasia is a language deficit that occurs after brain damage, often a stroke. The treatment of aphasia focuses on aspects of the aphasic speaker’s language and, importantly, on aspects of the language the person with aphasia communicates with most frequently (the conversation partner, CP). In conversation partner training treatment is directed either by clinical observation or by a qualitative analysis of a transcript and a videoed interaction between the person with aphasia and the CP. Following this, adaptations of the CP’s language are suggested based for example on turn-taking, the timing of the interaction, the language the CP uses and importantly, dealing with errors or mis-communications (called repair), the hall-mark of aphasia. The aim is to help the CP adapt their language to enhance the aphasic person’s understanding and ensure smooth and successful turns in conversation. The objective in this project is to quantify and evaluate change in the linguistic structure of the CP’s language before and after a treatment programme of conversation partner training.