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Clustering and Switching in Verbal Fluency Across Varying Degrees of Cognitive Control Demands: Evidence From Healthy Bilinguals and Bilingual Patients With Aphasia
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In: Neurobiol Lang (Camb) (2021)
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Abstract:
Different linguistic contexts place varying amounts of cognitive control on lexical retrieval in bilingual speakers, an issue that is complicated in bilingual patients with aphasia (BPWA) due to subsequent language and cognitive deficits. Verbal fluency tasks may offer insight into the interaction between executive and language control in healthy bilinguals and BPWA, by examining conditions with varying cognitive control demands. The present study examined switching and clustering in verbal fluency tasks in BPWA and healthy bilinguals across single- and dual-language conditions. We also examined the influence of language processing and language proficiency on switching and clustering performance across the dual-language conditions. Thirty-five Spanish-English BPWA and twenty-two Spanish-English healthy bilinguals completed a language use questionnaire, tests of language processing, and two verbal fluency tasks. The semantic category generation task included four conditions: two single-language conditions (No-Switch L1 and No-Switch L2) that required word production in each language separately; one dual-language condition that allowed switching between languages as desired (Self-Switch); and one dual-language condition that required switching between languages after each response (Forced-Switch). The letter fluency task required word production in single-language contexts. Overall, healthy bilinguals outperformed BPWA across all measures. Results indicate that switching is more sensitive to increased control demands than clustering, with this effect being more pronounced in BPWA, underscoring the interaction between semantic executive processes and language control in this group. Additionally, for BPWA switching performance relies on a combination of language abilities and language experience metrics.
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Keyword:
Research Article
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URL: https://doi.org/10.1162/nol_a_00053
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8884340/
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Predicting language treatment response in bilingual aphasia using neural network-based patient models
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In: Sci Rep (2021)
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Telerehabilitation for Word Retrieval Deficits in Bilinguals With Aphasia: Effectiveness and Reliability as Compared to In-person Language Therapy
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In: Front Neurol (2021)
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Telerehabilitation for word retrieval deficits in bilinguals with aphasia: Effectiveness and reliability as compared to in-person language therapy
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Predicting treatment outcomes for bilinguals with aphasia using computational modeling: Study protocol for the PROCoM randomised controlled trial
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White Matter Hyperintensities Predict Response to Language Treatment in Poststroke Aphasia ...
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supplamental_materials_NNR – Supplemental material for White Matter Hyperintensities Predict Response to Language Treatment in Poststroke Aphasia ...
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supplamental_materials_NNR – Supplemental material for White Matter Hyperintensities Predict Response to Language Treatment in Poststroke Aphasia ...
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White Matter Hyperintensities Predict Response to Language Treatment in Poststroke Aphasia ...
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Predicting treatment outcomes for bilinguals with aphasia using computational modeling: Study protocol for the PROCoM randomised controlled trial
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In: BMJ Open (2020)
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Verbal fluency as a measure of lexical access and cognitive control in bilingual persons with aphasia
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In: Aphasiology (2020)
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BiLex: A computational approach to the effects of age of acquisition and language exposure on bilingual lexical access
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The influence of prestroke proficiency on poststroke lexical-semantic performance in bilingual aphasia
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In: Aphasiology (2019)
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Strength of Temporal White Matter Pathways Predicts Semantic Learning
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Cognitive mechanisms underlying Armoni: A computer-assisted cognitive training programme for individuals with intellectual disabilities
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Novel word acquisition in aphasia: Facing the word-referent ambiguity of natural language learning contexts
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Novel word acquisition in aphasia: Facing the word-referent ambiguity of natural language learning contexts
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Language recovery and evidence of residual deficits after nonthalamic subcortical stroke: A 1 year follow-up study
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