Verbal fluency as a measure of lexical access and cognitive control in bilingual persons with aphasia

Carpenter, Erin; Rao, Leela; Peñaloza, Claudia

doi:10.1080/02687038.2020.1759774

Cited by 26 publications

(26 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aphasia is the most common speech and language disorder encountered in bilingual adults after a stroke leading to deficits that may differ across their two languages in terms of the specific language domains affected and their overall severity (7,8). Word retrieval deficits are a common feature across all aphasic clinical profiles and different patterns of performance and errors in lexical access across the two languages have been described in BWA (9,10). The effectiveness of in-person speech and language therapy has been largely demonstrated in BWA (11)(12)(13), and semantic feature-based treatments targeting word retrieval deficits have often shown significant improvements in lexical access in one or both languages (14)(15)(16)(17).…”

Section: Introductionmentioning

confidence: 99%

Telerehabilitation for Word Retrieval Deficits in Bilinguals With Aphasia: Effectiveness and Reliability as Compared to In-person Language Therapy

et al. 2021

Self Cite

View full text Add to dashboard Cite

Background: Bilinguals with post-stroke aphasia (BWA) require treatment options that are sensitive to their particular bilingual background and deficits across languages. However, they may experience limited access to bilingual clinical resources due to reduced availability of bilingual practitioners, geographical constraints, and other difficulties. Telerehabilitation can improve access to bilingual clinical services for BWA and facilitate the delivery of specific language treatments at distance, but more evidence on its effectiveness and reliability is needed. This study aimed to determine the equivalence of effectiveness and reliability of a semantic treatment for word retrieval deficits in BWA delivered via telerehabilitation relative to in-person therapy.Methods: We examined the retrospective data of 16 BWA who received 20 sessions of therapy based on semantic feature analysis for word retrieval deficits in person (n = 8) or via telerehabilitation (n = 8). The two groups were comparable on age, years of education, time of post-stroke onset, aphasia severity, and naming ability in both languages. Treatment effectiveness (i.e., effect sizes in the treated and the untreated language, and change on secondary outcome measures) and reliability (i.e., clinician adherence to treatment protocol) were computed for each delivery modality and compared across groups.Results: Significant improvements were observed in most patients, with no significant differences in treatment effect sizes or secondary outcomes in the treated and the untreated language between the teletherapy group and the in-person therapy group. Also, the average percentage of correctly delivered treatment steps by clinicians was high for both therapy delivery methods with no significant differences between the telerehabilitation vs. the in-person modality.Discussion: This study provides evidence of the equivalence of treatment gains between teletherapy and in-person therapy in BWA and the high reliability with which treatment for word retrieval deficits can be delivered via telerehabilitation, suggesting that the essential treatment components of the intervention can be conducted in a comparable manner in both delivery modalities. We further discuss the benefits and potential challenges of the implementation of telerehabilitation for BWA. In the future, telerehabilitation may increase access to therapy for BWA with varying linguistic and cultural backgrounds, thus, offering a more inclusive treatment approach to this population.

show abstract

Section: Introductionmentioning

confidence: 99%

Telerehabilitation for Word Retrieval Deficits in Bilinguals With Aphasia: Effectiveness and Reliability as Compared to In-person Language Therapy

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Verbal fluency tasks—quick and easy to administer and a part of routine neuropsychological assessment protocol—have been extensively used to examine such relationships between executive control and language functioning in healthy adults [ 4 , 5 , 6 ], and in clinical populations [ 7 , 8 , 9 , 10 , 11 ]. However, there are only a handful of studies that have studied the word retrieval difficulties and its relationship to executive control processes using verbal fluency tasks in bilinguals with aphasia [ 12 , 13 , 14 , 15 , 16 ]. This issue is more pertinent especially in the context of South Asian languages, as they are under-reported in the literature and there is a strong bias towards Germanic and Romance languages in aphasia research [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Recent work by Carpenter et al [ 12 ] found BWA to be more sensitive to the effects of increased executive control demand on a verbal fluency task relative to healthy controls. Participants (13 Spanish-English BWA and 22 BHC) performed the tasks in four conditions for the semantic fluency: No-Switch in L1 (NS-L1), No-Switch in L2 (NS-L2), Self-Switch (SS), and Forced Switch (FS).…”

Section: Introductionmentioning

confidence: 99%

“…1) The above-mentioned studies have only investigated semantic fluency (except the study by Carpenter and colleagues [ 12 ]), although previous research has shown a greater involvement of executive control abilities in letter fluency performance [ 6 , 12 ] (see [ 34 ] for a contrasting view). Given that executive control differences have been attributed to the performance advantage in verbal fluency in healthy controls [ 6 , 28 ], our understanding of verbal fluency in aphasia will benefit from a systematic comparison of semantic and letter fluency at a group and individual level.…”

Section: Introductionmentioning

confidence: 99%

“…We predict the BWA group to produce fewer correct responses in both semantic and letter fluency as compared to BHC. However, based on the existing literature [ 6 , 7 , 12 ], we expect BWA to have greater difficulty where executive control demand is higher (e.g., letter fluency, FDS, number of switches, between-cluster pauses). For the BWA individual analysis, we expect a similar pattern that is greater difficulty in the letter fluency condition and for the variables where executive control demand is higher.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lexical and Cognitive Underpinnings of Verbal Fluency: Evidence from Bengali-English Bilingual Aphasia

Patra

Bose

Marinis

2020

Behavioral Sciences

View full text Add to dashboard Cite

Research in bilingual healthy controls (BHC) has illustrated that detailed characterization of verbal fluency along with separate measures of executive control stand to inform our understanding of the lexical and cognitive underpinnings of the task. Such data are currently lacking in bilinguals with aphasia (BWA). We aimed to compare the characteristics of verbal fluency performance (semantic, letter) in Bengali–English BWA and BHC, in terms of cross-linguistic differences, variation on the parameters of bilingualism, and cognitive underpinnings. BWA showed significant differences on verbal fluency variables where executive control demands were higher (fluency difference score, number of switches, between-cluster pauses); whilst performed similarly on variables where executive control demands were lower (cluster size, within-cluster pauses). Despite clear cross-linguistic advantage in Bengali for BHC, no cross-linguistic differences were noted in BWA. BWA who were most affected in the independent executive control measures also showed greater impairment in letter fluency condition. Correlation analyses revealed a significant relationship for BWA between inhibitory control and number of correct responses, initial retrieval time, and number of switches. This research contributes to the debate of underlying mechanisms of word retrieval deficits in aphasia, and adds to the nascent literature of BWA in South Asian languages.

show abstract

Aphasia in Multilingual Patients

Goral

Hejazi

2021

Curr Neurol Neurosci Rep

View full text Add to dashboard Cite

Verbal fluency as a measure of lexical access and cognitive control in bilingual persons with aphasia

Cited by 26 publications

References 34 publications

Telerehabilitation for Word Retrieval Deficits in Bilinguals With Aphasia: Effectiveness and Reliability as Compared to In-person Language Therapy

Telerehabilitation for Word Retrieval Deficits in Bilinguals With Aphasia: Effectiveness and Reliability as Compared to In-person Language Therapy

Lexical and Cognitive Underpinnings of Verbal Fluency: Evidence from Bengali-English Bilingual Aphasia

Aphasia in Multilingual Patients

Contact Info

Product

Resources

About