Creating a Theoretical Framework to Underpin Discourse Assessment and Intervention in Aphasia

A feasibility randomised waitlist-controlled trial of a personalised multi-level language treatment for people with aphasia: The remote LUNA study

BACKGROUND

Stroke survivors with aphasia want to improve their everyday talking (discourse). In current UK practice, 90% of speech and language therapists believe discourse assessment and treatment is part of their role but are hampered by barriers in resources, time and expertise. There is a clinical need for well-articulated discourse assessment and treatments. LUNA is a multi-level treatment targeting words, sentences and discourse macrostructure in personal stories that addresses this clinical need.

OBJECTIVES

This study aimed to assess the feasibility and acceptability of LUNA trial procedures in a randomised waitlist-controlled trial; and to evaluate preliminary efficacy.

METHODS

This paper reports a phase II, waitlist-controlled, proof-of-concept feasibility trial. Participants with chronic aphasia (n = 28) were recruited from the community and randomised to an Immediate (n = 14) or Delayed (n = 14) group. LUNA treatment was delivered twice weekly for 10 weeks via the videoconferencing technology, Zoom. Feasibility was assessed in terms of participant recruitment and retention, adherence, missing data, and treatment fidelity. Preliminary treatment efficacy was assessed in terms of between group differences in outcome measures relating to discourse, language, and psychosocial state.

RESULTS

The remote LUNA trial was feasible: 85% of those eligible consented to the trial; trial retention was 86%; 87% of treatment sessions were delivered as scheduled, and 79% of participants completed 80%+ of the treatment programme; data was missing only for participants who withdrew; treatment fidelity was high at 92% adherence; and only one clinical outcome measure demonstrated ceiling effects. ANCOVA analysis of the clinical outcome measures revealed group differences with medium and large effect sizes, indicating, improvements in the production of words, sentences, discourse macrostructure, overall language functioning (WAB-R), and psychosocial state (VAMS) following LUNA treatment. For most outcomes measured, similar treatment benefits were suggested in a secondary, non-parametric analysis.

CONCLUSIONS

Large-scale evaluation of the clinical efficacy and cost-effectiveness of LUNA is warranted and supported by these findings.

TRIAL REGISTRATION

Clinical trials registration: NCT05847023 (clinical trials.gov).

Validation of a Cantonese Version of the Amsterdam-Nijmegen Everyday Language Test (CANELT): A functional approach

BACKGROUND

The current study aimed to validate the Cantonese version of the Amsterdam-Nijmegen Everyday Language Test (CANELT), a functional communication assessment tool for Cantonese speakers with aphasia. A quantitative scoring method was adopted to examine the pragmatics and informativeness of the production of people with aphasia (PWA).

METHOD

CANELT was translated from its English version with cultural adaptations. The performance on the 20-item CANELT collected from 56 PWA and 100 neurologically healthy Cantonese-speaking controls aged 30 to 79 years was orthographically transcribed. Scoring was based on the completeness of the main concepts produced in the preamble and subsequent elaborations, defined as Opening (O) and New Information (NI). Measures examining the validity and reliability were conducted.

RESULTS

An age effect was found in neurologically healthy controls, and therefore z scores were used for subsequent comparisons between neurologically healthy controls and PWA. The test showed strong evidence for known-group validity in both O [χ2 (2) = 95.2, p < .001] and NI [χ2 (2) = 100.4, p < .001]. A moderate to strong correlation was found between CANELT and standardized aphasia assessment tools, suggesting satisfactory concurrent validity. Reliability measures were excellent in terms of internal consistency (Cronbach's α of .95 for both 'O' and 'NI'), test-retest reliability (ICC = .96; p < .001), intra-rater reliability (ICC = 1.00; p < .001), and inter-rater reliability for O (ICC = .99; p < .001) and NI (ICC = .99; p < .001). Sensitivity and specificity for O are 97% and 76.8%, respectively, while for NI, a sensitivity of 95% and specificity of 91.1% were obtained.

CONCLUSIONS

Measures on validity and reliability yielded promising results, suggesting CANELT as a useful and reliable functional communication assessment for PWA. Its application in managing PWA and potential areas for development are discussed.

A scoping review of transcription-less practices for analysis of aphasic discourse and implications for future research

BACKGROUND

It is important to capture a comprehensive language profile from speakers with aphasia. One way to do this is to evaluate spoken discourse, which is language beyond a single simple clause used for a specific purpose. While the historical trend in aphasiology has been to capture performance during isolated language tasks, such as confrontation naming, there is a demonstrated need and benefit to collecting language information from tasks that resemble everyday communication. As a result, there has been an increase in discourse analysis research over time. However, despite clinicians' and researchers' desire to analyse spoken discourse, they are faced with critical barriers that inhibit implementation.

AIMS

To use scoping review methodology to identify transcription-less tools developed to analyse discourse from individuals with aphasia. The review addressed the following question: 'What transcription-less tools and analysis procedures are available to assess discourse in people with aphasia?' and included several sub-questions to further characterise the type of discourse and tool being used, participants on whom the tool was used to rate discourse abilities, tool users (raters), and psychometric properties.

METHODS

The scoping review was conducted between the months of October 2022 and January 2023, concluding 30 January 2023, on PubMed/NCBI, Academic Search Complete and Linguistics and Language Behavior Abstracts. Major inclusion parameters included peer-reviewed papers written in English; that the tool was used to analyse discourse elicited by individuals with acquired aphasia; and that the tool was not a part of a standardised battery or assessment. Perceptual discourse analysis was defined as any analysis which primarily relied on listener impressions and did not numerically quantify specific language behaviours. 'Transcription-less' analysis was defined as any discourse analysis which did not require a written record of the discourse sample in order to be completed. A total of 396 abstracts were screened and 39 full articles were reviewed, yielding 21 papers that were included in the review.

MAIN CONTRIBUTION

An overview of the state of transcription-less tools for aphasic discourse analysis is provided, and next steps are identified to facilitate increased implementation of discourse analysis in clinical and research settings.

CONCLUSION

Transcription-less tools have many benefits for analysing multiple levels (e.g., linguistic, propositional, macrostructural, pragmatic) of discourse, but require more research to establish sound psychometric properties and to explore the implementation of these tools in clinical settings.

WHAT THIS PAPER ADDS

What is already known on this subject Individuals with aphasia prioritise treatment outcomes at the discourse level such as being able to engage in conversations with friends and family about important topics and participating in social and leisure activities. However, discourse is rarely used as a treatment outcome measure in clinical practice due to multiple barriers. When speech-language pathologists do assess discourse, they often make perceptual judgements without transcribing the discourse sample. Transcription-less analysis procedures may improve clinical implementation of discourse assessment, which would better match treatment outcome measurement to clients' desired outcomes. However, little is known about the current state of transcription-less discourse analysis, blocking progress. What this paper adds to existing knowledge This study provides an overview of currently available transcription-less discourse analysis procedures that are not part of published standardised aphasia assessments. Transcription-less measures are available to evaluate discourse at all levels (i.e., lexical, propositional, macro-structural/planning, and pragmatic) and most measures include items that assess discourse abilities across multiple levels. Additionally, there are transcription-less measures available for both structured (e.g., picture scene description) and spontaneous (e.g., conversation) discourse tasks. However, current transcription-less procedures are lacking psychometric data including information about validity and reliability. What are the potential or actual clinical implications of this work? Transcription-less analysis methods may provide an avenue for increased implementation of discourse measurement into clinical practice. Further research is needed to determine the clinical utility of transcription-less discourse analysis to better monitor clients' desired treatment outcomes.

Discourse Task Type-Specific Linguistic Characteristics in Anomic Aphasia and Healthy Controls: Evidence From Mandarin-Chinese AphasiaBank

PURPOSE

This study was designed to examine the hypothesis that discourse task types influence language performance in Mandarin Chinese-speaking people and to reveal the discourse task-specific linguistic properties of persons with anomic aphasia compared to neurotypical controls.

METHOD

Language samples from persons with aphasia (n = 31) and age- and education-matched controls (n = 31) across four discourse tasks (sequential-picture description, single-picture description, story narrative, and procedural discourse) were collected from Mandarin AphasiaBank. Task-specific distributions of parts of speech were analyzed using mosaic plots. The main effects of tasks in each group and the between-group differences within each task for several typical linguistic variables were evaluated, including the mean length of utterance, tokens, moving-average type-token ratio, words per minute, propositional density, noun-verb ratio, noun percentage, and verb percentage.

RESULTS

The results revealed an impact of discourse tasks on most language variables in both groups. In the healthy controls, story narratives yielded the highest total words and lowest verb percentage. In the aphasia group, procedural discourse elicited the fewest total words and densest expressions, whereas their single-picture descriptions had the highest noun-verb ratio. For all tasks, the aphasia group performed worse than the control group in the mean length of utterance, tokens, moving-average type-token ratio, and words per minute. For noun-verb ratio, noun percentage, and verb percentage, only one task (i.e., single-picture description) showed significant between-group differences.

CONCLUSION

The selection of discourse tasks should be addressed in assessments and interventions for Mandarin Chinese-speaking individuals with aphasia to obtain more accurate and feasible outcomes.

Resting state correlates of picture description informativeness in left vs. right hemisphere chronic stroke

Introduction

Despite a growing emphasis on discourse processing in clinical neuroscience, relatively little is known about the neurobiology of discourse production impairments. Individuals with a history of left or right hemisphere stroke can exhibit difficulty with communicating meaningful discourse content, which implies both cerebral hemispheres play a role in this skill. However, the extent to which successful production of discourse content relies on network connections within domain-specific vs. domain-general networks in either hemisphere is unknown.

Methods

In this study, 45 individuals with a history of either left or right hemisphere stroke completed resting state fMRI and the Cookie Theft picture description task.

Results

Participants did not differ in the total number of content units or the percentage of interpretative content units they produced. Stroke survivors with left hemisphere damage produced significantly fewer content units per second than individuals with right hemisphere stroke. Intrinsic connectivity of the left language network was significantly weaker in the left compared to the right hemisphere stroke group for specific connections. Greater efficiency of communication of picture scene content was associated with stronger left but weaker right frontotemporal connectivity of the language network in patients with a history of left hemisphere (but not right hemisphere) stroke. No significant relationships were found between picture description measures and connectivity of the dorsal attention, default mode, or salience networks or with connections between language and other network regions.

Discussion

These findings add to prior behavioral studies of picture description skills in stroke survivors and provide insight into the role of the language network vs. other intrinsic networks during discourse production.

A bibliometrix-based visualization analysis of international studies on conversations of people with aphasia: Present and prospects

In recent years, there has been a rapid increase in the number of people with aphasia due to brain lesions worldwide, which has prompted researchers to carry out in-depth studies on the pathogenesis, inducement and prognosis of aphasia from neurology, clinical medicine, psychology and other disciplines. With the deepening of research and understanding of aphasia, it is generally believed that a single discipline can no longer meet the needs of the academic community. Therefore, multidisciplinary integration has emerged and achieved fruitful results. This paper, based on the biblioshiny package run by R, conducts bibliometric analysis on the international interdisciplinary research status of conversation and aphasia, predicts its future development direction, and provides reference for relevant domestic research from international source journals. The results indicate that led by Australia, the United Kingdom, the United States and other countries, the international conversational aphasia research has formed a complete system, and formed a "descriptive study of patients with language disorders" and "applied study of rehabilitation treatment". In the future, while continuing to focus on these two categories of research, the empathy ability of conversational partners and medical staff may be taken into account, in order to better contribute to improving patients' quality of life.

"Please Don't Assess Him to Destruction": The R.A.I.S.E. Assessment Framework for Primary Progressive Aphasia

PURPOSE

Speech-language pathologists (SLPs) assess people with primary progressive aphasia (PPA) through measurements of speech, language, communication, and well-being, with the aims of identifying challenges and strengths, monitoring change, and informing treatment directions and supports. The purpose of this clinical focus article is to highlight the necessity for person-centered assessment specific to PPA and to conceptualize a framework that acknowledges the multifaceted nature of assessment for this population. In this framework, the unique challenges posed by a diagnosis of PPA are addressed with the aim to provide practical guidance for clinicians and to support reflection on current practices.

METHOD

In clinical and research practice, assessment of people with PPA requires an ever-evolving approach that is centered on the client. In this clinical focus article, a discussion-based consensus process was used to synthesize authentic longitudinal experiences of people with PPA to explore assessment approaches, tools, and philosophies.

RESULTS

This analysis of person-centered assessment identifies seven essential components of assessment in PPA that set the foundation for the five steps of the R.A.I.S.E. Assessment framework. These components each contribute to a clear definition of assessment that reveals clients' competencies with a strengths-based focus; prioritizes the reciprocity of benefits; promotes dynamic assessment; and recognizes the complexity, evolution of assessment over time, and advocacy.

CONCLUSIONS

This clinical focus article takes a novel look at assessment in PPA by stepping away from assessment practices that focus on revealing deficits and decline and, instead, provides practical recommendations through the conceptualization of a PPA-specific assessment framework. The R.A.I.S.E. Assessment framework is grounded in principles of uplifting clients through person-centered assessment, keeps pace with best practice in PPA intervention, and contributes to a supportive experience for clients and families in the face of a progressive diagnosis over time.

Management of communication disability in the first 90 days after stroke: a scoping review

INTRODUCTION

People with communication disability after stroke need interventions to optimise healthcare communication and rehabilitation outcomes. Current evidence syntheses do not adequately inform the management of communication disability during the first 90 days post-stroke.

PURPOSE

To explore the scope of literature for the management of communication disability in the first 90 days after stroke.

MATERIALS AND METHODS

A scoping review was conducted using a systematic keyword search of six databases. A descriptive synthesis was generated using communication-related domains related to the biopsychosocial framework of the International Classification of Functioning, Disability, and Health (ICF).

RESULTS

A total of 129 studies met eligibility criteria. Aphasia was the most frequently addressed communication disability after stroke (76/129 studies) with a paucity of evidence investigating other acquired neurogenic communication impairments. Management predominantly focused on communication-related: body functions and structures (62 studies) (e.g., linguistic-behavioural therapies), followed by environmental factors (39 studies) (e.g., communication partner training/support); activities and participation (15 studies) (e.g., augmentative and alternative communication); and personal factors (13 studies) (e.g., assessment of depression after aphasia).

CONCLUSION

A coordinated, integrated approach to developing and testing acute and subacute interventions for all communication disabilities across all communication-related domains is required.IMPLICATIONS FOR REHABILITATIONInterdisciplinary stroke clinicians need to manage communication disabilities in the first 90 days after stroke to optimise healthcare communication and rehabilitation outcomes.There is some evidence to guide clinicians in aphasia management but less in other disabilities of speech and cognitive functioning.Most interventions to inform clinical practice address communication-related body functions and structures (e.g., linguistic and speech therapies). Clinicians need to address all domains and more evidence is needed to address environmental factors (e.g., communication support); activities and participation (e.g., person-centred goal setting); and personal factors (e.g., psychological care).

Sentence Production in a Discourse Context in Latent Aphasia: A Real-Time Study

PURPOSE

The purpose of this study was to improve our understanding as to which factors determine online, spoken sentence production abilities of adults with latent aphasia in a discourse context.

METHOD

Discourse samples of the story of Cinderella elicited from AphasiaBank were analyzed with speech analysis software. Participants comprised people with latent and anomic aphasia as well as neurotypical controls (10 per group). Durations of pauses (silent and filled) were analyzed according to (a) the location they occurred (between or within sentences), (b) the syntactic complexity of sentences (simple, complex), and (c) sentence length (number of words). Statistical comparisons were conducted using mixed-effect models.

RESULTS

The two clinical groups (latent and anomic) differed from controls in the duration of pauses, both between and within sentences. Syntactic complexity did not exert an effect on either of the two clinical groups as compared with controls. As compared with controls, both clinical groups paused more before long in comparison with short sentences.

CONCLUSION

Reduction in processing speed, which affects the ability to simultaneously maintain multiple linguistic and other cognitive demands associated with planning and monitoring of utterances, is a major factor that compromises sentence production in spoken discourse in latent aphasia.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.19448726.

A Systematically Conducted Scoping Review of the Evidence and Fidelity of Treatments for Verb and Sentence Deficits in Aphasia: Sentence Treatments

PURPOSE

This review article synthesizes and evaluates the evidence for sentence production treatments in aphasia, systematically charting impairment-based and functional communication outcomes. It reports (a) the level of evidence and fidelity of sentence treatments; (b) the impact of treatment on production of trained and untrained verbs and sentences, functional communication, and discourse; and (c) the potential active ingredients of treatment.

METHOD

The search included studies from January 1980 to June 2019. The level of evidence of each study was documented, as was fidelity in terms of treatment delivery, enactment, and receipt. Studies were also categorized according to treatment methods used.

RESULTS

Thirty-three studies were accepted into the review and predominantly constituted Level 4 evidence (e.g., case control studies and case series). Thirty studies (90%) described treatment in sufficient detail to allow replication, but dosage was poorly reported, and fidelity of treatment was rarely assessed. The most commonly reported treatment techniques were mapping (10 studies: 30%), predicate argument structure treatment (six studies: 18%), and verb network strengthening treatment (five studies: 15%). Production of trained sentences improved for 83% of participants, and improvements generalized to untrained sentences for 59% of participants. Functional communication was rarely assessed, but discourse production improved for 70% of participants.

CONCLUSIONS

The evidence for sentence treatments is predominantly generated from Level 4 studies. Treatments were effective for the majority of participants regarding trained sentence and discourse production. However, there is inconsistent use of statistical analysis to verify improvements, and diverse outcome measures are used, which makes interpretation of the evidence difficult. The quality of sentence treatment research would be improved by agreeing a core set of outcome measures and extended by ascertaining the views of participants on sentence treatments.