A Multimodal Study on Aspect Markers by Mandarin Chinese Individuals With Broca's Aphasia

Area of Science:

• Linguistics
• Neuroscience
• Psychology

Background:

• Grammatical aspect in Mandarin Chinese individuals with aphasia (IWA) is an understudied area.
• Aspectual markers encode event boundaries, reflecting cognitive event segmentation.
• A gap exists between linguistic/clinical and cognitive research on aspect in IWA.

Purpose of the Study:

• To assess production and comprehension deficits of perfective and imperfective aspect markers in Mandarin Chinese IWA compared to controls.
• To investigate potential asymmetry between perfective and imperfective aspect processing in IWA.
• To explore event boundary decisions in IWA for links between linguistic and cognitive abilities.

Main Methods:

• Thirteen Mandarin Chinese IWA and 30 age-matched healthy controls participated.
• Video-based multimodal tasks were used, including sentence production, sentence-video rating, and event-boundary location.
• Comprehension and production of verbal aspect markers were assessed.

Main Results:

• IWA demonstrated impaired production of both perfective and imperfective aspect markers, with a more significant deficit in perfective aspect.
• In comprehension tasks, IWA rated sentences with aspect markers lower than controls, showing no difference between perfective and imperfective.
• IWA did not exhibit impairment in marking event boundaries during the event segmentation task.

Conclusions:

• The observed asymmetry in aspect production supports the Past Discourse Linking Hypothesis.
• Findings highlight the need for assessment and intervention frameworks integrating grammatical deficits with discourse processing.
• Multifaceted models of aphasia are necessary to explain interactions between language-specific structures and cognitive processes.