Psycholinguistics and Neurolinguistics Commons^™

The Impact Of Semantics And Syntax On Lexical Retrieval In Individuals With Aphasia, Marta M. Korytkowska

Dissertations, Theses, and Capstone Projects

Nearly all people with aphasia (PWA) report difficulty with lexical retrieval (i.e., anomia). While there are several tasks used to measure lexical retrieval, each poses different degrees and types of challenges. For example, some studies have found that PWA performance varies depending on the type of lexical retrieval task. The tasks that have been used include lexical retrieval in isolation tasks (such as picture-naming), lexical retrieval in sentence level tasks (such as narration tasks), and lexical retrieval in sentence-completion tasks. Some studies have found no differences between the accuracy of lexical retrieval in isolation and at the sentence level (e.g., …

Functional Differentiation In The Language Network Revealed By Lesion-Dymptom Mapping, William Matchin, Alexandra Basilakos, Dirk B. Den Ouden, Brielle C. Stark, Gregory Hickok, Julius Fridriksson

Communication Sciences and Disorders Faculty Articles and Research

Theories of language organization in the brain commonly posit that different regions underlie distinct linguistic mechanisms. However, such theories have been criticized on the grounds that many neuroimaging studies of language processing find similar effects across regions. Moreover, condition by region interaction effects, which provide the strongest evidence of functional differentiation between regions, have rarely been offered in support of these theories. Here we address this by using lesion-symptom mapping in three large, partially-overlapping groups of aphasia patients with left hemisphere brain damage due to stroke (N = 121, N = 92, N = 218). We identified multiple measure by …

Identifying A Culturally Appropriate Stimulus For The Bangla Picture Description Task, Barnali Mazumdar

LSU Doctoral Dissertations

The absence of culture- and language-specific aphasia assessment in Bangla underscores a critical problem in Communication Sciences and Disorders. Aphasia occurs in ~41% of stroke survivors. Over 40 years, stroke incidence has doubled in the low- and middle-income countries, such as Bangladesh and India, where there are ~250 million native Bangla speakers.

This study aimed to identify an appropriate picture stimulus for the Bangla Picture Description Task (PDT) intended for inclusion in a Bangla aphasia assessment. Researchers have reported the importance of cultural relevance and three visuographic variables of a picture, i.e., high-context, color, and photograph vs. black and white …

Language-Mixing In Discourse In Bilingual Individuals With Non-Fluent Aphasia, Avanthi Paplikar

Dissertations, Theses, and Capstone Projects

Language-mixing (LM) as defined by Chengappa (2009, p. 417) is an “intra-sentential phenomenon referred to as the mixing of various linguistic units (morphemes, words, modifiers, phrases, etc.), primarily from two participating grammatical systems”. LM is influenced by grammatical, environmental, and social constraints (e.g., Milroy & Wei, 1995; Bhat & Chengappa, 2005). Researchers have suggested that LM in patients with aphasia is a communicative strategy used to achieve successful exchanges between speakers; the effectiveness of this mixing, however, had yet to be demonstrated quantitatively.

In the current study we investigated whether LM is present in bilingual speakers with aphasia, and if …

Divorcing Speech Ability And Intelligence: Why The Two Can No Longer Be Strongly Linked Together, Savannah E. Sims

Senior Honors Theses

Human language is a complex cognitive ability that is still not fully understood by scientists. Except in rare occasions of extreme seclusion or disability, children are able to acquire language without explicitly being taught how. Though animals have the ability to communicate, their “languages” are not comparable to human language. Commonly, people believe that one’s language ability correlates directly to one’s intelligence. It is the purpose of this paper to explore that belief and test its veracity. My hypothesis is that this correlation does not exist or is at best weak. This will be done by looking at several language-related …