Early Impairment of Narrative Discourse Complexity in Parkinson Disease Patients without Mild Cognitive Impairment

This dataset was collected to investigate narrative discourse with the Cookie Theft (CT) picture in PD patients with and without MCI, in addition to other classical measures of language production. Moreover, the authors explore which components of language production are associated with the progression of neurological impairment and the diagnosis of MCI. Participants were evaluated with a set of linguistic instruments, including the CT picture, verbal fluency test (phonemic and semantic) and naming task. The data demonstrates that impairment in narrative discourse in PD can be present regardless of cognitive status and degree of neurological impairment, in contrast to other language production difficulties, which are associated with MCI diagnosis and disease progression.