In a number of studies, my aim has been to determine how atypical speech productions differ from typical ones. I consider the first line of research presented in the previous sections, as a kind of map of the typical productions of these two varieties. Therefore, methods that compare the atypical productions to the typical ones will reveal how the two groups differ. To this purpose, I investigate the effects of mild cognitive impairment, Alzheimer’s disease, SLI, and aphasia on speech. Currently, in collaboration with other researchers from various universities, we are preparing a study with respect to the effects of cortical thickness on prosody in atypical speech productions (mild cognitive impairment and Alzheimer’s disease), which is a follow-up study of the study ``Effects of cortical thickness on pause duration in neurotypical adults’ speech: Evidence for the role of the left middle temporal gyrus in lexical retrieval’’ that will be presented this year in Baltimore at the Society for the Neurobiology of Language.
In current work to be presented in the Academy of Aphasia conference (Fyndanis, Themistocleous, and Christidou, 2017), we explore the manifestation of time reference in agrammatic aphasia. This study explored the relationship between time reference and aspect focusing on Greek aphasia. In Greek, verb forms referring to the past and future encode the perfective-imperfective contrast. Results challenge the idea of prototypical and non-prototypical associations between time reference and aspect. The double dissociation that emerged in the Aspect condition indicates that a given time reference-aspect combination may be relatively easy to process for some PWA but demanding for some others. Thus, studies investigating tense/time reference in aphasia should ensure that this grammatical/semantic category is not confounded by aspect. A journal article with this topic is also under preparation. Moreover, in a joint preliminary work with Elena Papadopoulou, which was presented in 5th International Conference on Language Disorders in Greek, we showed that there are different alignment effects along with differences in pitch range in the production of the prosody of SLI speakers of Cypriot Greek.