Core Lexicon and Main Concept Production during Picture Description

Hudspeth, Sarah Grace and Richardson, Jessica D. (2014) Core Lexicon and Main Concept Production during Picture Description. [Clinical Aphasiology Paper]

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Abstract

Discourse is a highly complex and individualized communication act wherein individuals not only transmit and receive information for survival and cooperation, but also use spoken language for ritual purposes (e.g., relationships, fellowship, co-participation; Carey, 1988; Dimbleby & Burton, 1998). Discourse in typical and clinical populations has been investigated with a variety of structuralist, functionalist, and hybrid techniques (see Armstrong, 2000), and is known to be a good predictor of quality of life and life participation in persons with aphasia (PWAs). Discourse analysis, however, generally requires specialized training and can be time-consuming. MacWhinney, Fromm Holland, Forbes, & Wright (2010) suggested that analysis of a core lexicon during structured narrative tasks could provide a time-efficient and informative index of functional communication abilities. For example, clinicians could bypass lengthy transcriptions, instead generating a list of words spoken during narration for later comparison to a core lexicon (CoreLex). Using various methods, CoreLex has so far been investigated for the Cinderella story, a monologic story retell narrative task (Author1, Dillow, & Author2, 2013; MacWhinney et al., 2010) and a procedural narrative task where patients describe how to make a PB&J sandwich (Fromm, Forbes, Holland, & MacWhinney, 2013). CoreLex performance is strongly correlated with main concept (MC) production, a measure of narrative adequacy, during Cinderella retelling (Author1, Dillow, & Author2, 2013). Similar investigations for other narrative tasks are needed. The aims of this study were to 1) determine the CoreLex of a picture sequence description task included in the AphasiaBank protocol (Breaking Window), 2) calculate a CoreLex score for controls and PWAs, and 3) determine how well CoreLex predicts narrative adequacy, as judged by MC analysis.

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