Sentence interpretation in normal and aphasic Hindi speakers

Area of Science:

• Linguistics
• Neurolinguistics
• Psycholinguistics

Background:

• Listeners utilize various linguistic cues to assign grammatical roles like agent and patient during sentence interpretation.
• Hindi's grammatical structure, where animacy influences sentence acceptability without accusative marking, makes it relevant for studying Broca's aphasia and its potential grammar-semantics dissociation.

Purpose of the Study:

• To investigate the relative importance of three cues to agenthood (word order, noun animacy, subject-verb agreement) in Hindi.
• To examine these cues in both normal and aphasic Hindi speakers, including bilingual individuals.
• To test the hypothesis that Broca's aphasia involves a dissociation between grammar and semantics by analyzing language-specific processing strategies.

Main Methods:

• Study 1: Assessed cue ranking in normal Hindi-dominant speakers.
• Study 2: Tested Hindi-English bilinguals in both languages to observe strategy use.
• Study 3: Evaluated two Hindi-English bilinguals with Broca's aphasia in both languages.

Main Results:

• In normal Hindi speakers, animacy was the strongest cue, and agreement the weakest.
• Bilinguals generally showed Hindi-specific animacy dominance but mixed strategies in English interpretation.
• Aphasic bilinguals demonstrated language-specific patterns (animacy in Hindi, word order in English), consistent with normal bilinguals.

Conclusions:

• Sentence interpretation strategies in Hindi-speaking aphasic patients, particularly the use of animacy, reflect preserved, language-specific processing.
• These findings suggest that the observed strategies are not compensatory nonlinguistic mechanisms for receptive agrammatism.
• The results support the understanding of sentence comprehension in both monolingual and bilingual aphasic individuals across different languages.