“…The person with aphasia and their communication partners may also be asked to keep communication diaries to provide a more objective measure of conversational topics and enable detection of their personal strengths and weaknesses (e.g., Simmons-Mackie & Damico, 2001). Analyses of authentic conversation samples can also offer a window onto people's communication (see, e.g., Beeke, Maxim, & Wilkinson, 2007;Lesser & Perkins, 1999;Perkins, Crisp, & Walshaw, 1999) and can be used to provide information on people's lexical choices (e.g., Schegloff, Koshik, Jacoby, & Olsher, 2002). A question that remains unanswered, however, is how many different speech samples and how much time is needed to infer truly individualised sets of vocabularies.…”