Analyzing agrammatic narrative production using Northwestern Narrative Language Analysis (NNLA) and Computerized Language Analysis (CLAN): A qualitative and quantitative comparison

Hsu, Chien-Ju and Thompson, Cynthia K (2013) Analyzing agrammatic narrative production using Northwestern Narrative Language Analysis (NNLA) and Computerized Language Analysis (CLAN): A qualitative and quantitative comparison. [Clinical Aphasiology Paper]

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Abstract

Spontaneous language sample analysis is often used to characterize production deficit patterns in aphasia. Methods for accomplishing this, however, are labor-intensive. The Computerized Language Analysis (CLAN) system, developed for analyzing children’s language production, has recently been adopted for analysis of aphasic speech samples through AphasiaBank. However, the extent to which this automated system accurately quantifies lexical and morophosyntactic deficits, commonly seen in agrammatism, has not been explored. This study compared the CLAN with the Northwestern Narrative Language Analysis (NNLA) system, developed to evaluate linguistic deficits in aphasia. Results indicate that the CLAN does not identify important characteristics of agrammatic production. (100)

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