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Sensitivity to inflectional morphology in aphasia: a real-time processing perspective.

A D Friederici¹, J M Wessels, K Emmorey

¹Institut für Psychologie, Freie Universität Berlin, Germany.

Brain and Language

|November 1, 1992

Summary

Broca

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Area of Science:

Neuroscience
Linguistics
Psychology

Background:

Broca's aphasia is a language disorder characterized by difficulties in language production.
Understanding morphological processing in aphasia is crucial for diagnosing and treating language impairments.
German, a highly inflected language, provides a rich environment for studying morphological sensitivity.

Purpose of the Study:

To investigate the sensitivity of individuals with Broca's aphasia to morphological information in real-time.
To determine if Broca's aphasics can detect incorrect inflections and the absence of obligatory inflections.
To explore the role of inflectional morphology in lexical category and grammatical agreement processing for aphasic patients.

Main Methods:

Two word monitoring experiments were conducted using German as the test language.
Participants included individuals with Broca's aphasia and normal controls.
Sensitivity to the presence of incorrect inflections and the absence of obligatory inflections was assessed.

Main Results:

Broca's aphasics, like normal controls, detected contextually incorrect inflections.
Unlike normal controls, Broca's aphasics did not detect the absence of obligatory inflections.
Sensitivity to incorrect inflections was observed only when they marked lexical category (noun/verb), not grammatical person.

Conclusions:

Broca's aphasics exhibit deficits in processing inflectional morphology, particularly in detecting omissions.
The findings suggest an impairment in the automatic and obligatory processing of syntactic information in closed-class elements.
This study provides evidence for distinct processing mechanisms for different types of inflectional information in Broca's aphasia.

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