Communication Sciences and Disorders Commons^™

Light And Heavy Verb Usage By People With Non-Fluent Aphasia, Chase Sophia Kozak

Honors Theses

The purpose of the study was to investigate the discourse elicitation task effect and whether it affects the production of verbs with different semantic weight (light verbs with vague semantic representations, e.g., ‘do’, or heavy verbs with specific semantic representations, e.g., ‘deliver’). Thirty people with non-fluent aphasia and twenty people without aphasia were included. The light and heavy verb ratios over the total number of verbs were calculated for two discourse elicitation tasks: sequential picture description and storytelling. The results for the healthy control group showed that they produced a significant higher heavy verb ratio in sequential picture description than …

Predictors Of Poststroke Aphasia Recovery: A Systematic Review-Informed Individual Participant Data Meta-Analysis, Marian C. Brady, Release Collaborators, Jackie Hinckley

HPD Articles

Background and Purpose:

The factors associated with recovery of language domains after stroke remain uncertain. We described recovery of overall-language-ability, auditory comprehension, naming, and functional-communication across participants’ age, sex, and aphasia chronicity in a large, multilingual, international aphasia dataset.

Methods:

Individual participant data meta-analysis of systematically sourced aphasia datasets described overall-language ability using the Western Aphasia Battery Aphasia-Quotient; auditory comprehension by Aachen Aphasia Test (AAT) Token Test; naming by Boston Naming Test and functional-communication by AAT Spontaneous-Speech Communication subscale. Multivariable analyses regressed absolute score-changes from baseline across language domains onto covariates identified a priori in randomized controlled trials and all …

Light And Heavy Verb Productions Between Single And Sequential Picture Description Tasks In People With And Without Non-Fluent Aphasia, Jessica Hall

Honors Theses

Background: Previous research has shown that persons with non-fluent aphasia (PWNFA) suffer from the inability to retrieve words, specifically more of a difficulty with verb productions. Various discourse elicitation tasks have shown to have differing effects on verb retrievals in this population. However, there is a lack of research on the relationship between single vs. sequential picture description tasks and the productions of heavy and light verbs in persons with non-fluent aphasia.

Purpose: The purpose of this study was to analyze the ratios of heavy and light verbs produced in both single picture description tasks and sequential picture description tasks …

Telepractice In The Communication Treatment Of Individuals With Post-Stroke Aphasia: Systematic Review, Gayanthi Kodituwakku-Wewalwala

Graduate Theses and Dissertations

Telepractice, a branch of telehealth, which is the delivery of services to distant sites employing telecommunication, has been developing rapidly nowadays. Owing to the nature of the condition and treatment foci in aphasia, telepractice has been identified as a potential mode for intervention to persons with aphasia (PWA) in the field of speech-language pathology. Based on the American Speech-Language Hearing Association (2005), telepractice is considered a means to extend services to a wider context overcoming the barriers of transportation, costs, and limited availability of services. Thus, exploration of treatment accessibility to underserved populations in middle/low-income countries or rural areas via …

Therapy Approaches For Broca’S Aphasia: Consultative Vs. Clinician Directed, Stacey Nichole Mott

Student Theses and Dissertations

This investigation sought to explore the outcomes from two common therapy approaches, consultative and clinician directed, to language and communication rehabilitation for individuals with Broca’s aphasia. Both approaches are recognized as evidence-based and are used across many clinical settings. This single case study was performed using standardized assessment, informal measures, and a survey. The data collection reveals that there are positive outcomes to both methods of therapy. However, this study revealed a need to continue investigating the prevalence of use for both types of therapy approaches used by speech-language pathologists in various rehabilitative settings.

Using Dialogic Reading To Facilitate Intergenerational Interactions In Persons With Aphasia: A Feasibility Study, Gillian I. Anderson

Honors Undergraduate Theses

The purpose of this study was to evaluate the effectiveness of teaching dialogic reading (DR) strategies to patients with aphasia (PWA) as measured by DR strategy use during virtual training sessions. The secondary purpose was to improve psychosocial factors, including communicative participation, perceived stress, and confidence. A single subject multiple baseline across behaviors research design was employed via a telehealth model to examine a training program in DR strategies on expressive linguistic abilities and aspects of quality of life (QoL) in a PWA. Treatment was given four to five times a week and the session length varied based on the …

Spoken Discourse Assessment And Analysis In Aphasia: An International Survey Of Current Practices, Tyson G. Harmon, Brielle C. Stark, Manaswita Dutta, Laura L. Murray, Davida Fromm, Lucy Bryant

Faculty Publications

Purpose

Spoken discourse analysis is commonly employed in the assessment and treatment of people living with aphasia, yet there is no standardization in assessment, analysis, or reporting procedures, thereby precluding comparison/meta-analyses of data and hindering replication of findings. An important first step is to identify current practices in collecting and analyzing spoken discourse in aphasia. Thus, this study surveyed current practices, with the goal of working toward standardizing spoken discourse assessment first in research settings with subsequent implementation into clinical settings.

Method

A mixed-methods (quantitative and qualitative) survey was publicized to researchers and clinicians around the globe who have collected …

Predictors Of Poststroke Aphasia Recovery: A Systematic Review-Informed Individual Participant Data Meta-Analysis, The Rehabilitation And Recovery Of People With Aphasia After Stroke (Release) Collaborators

Research outputs 2014 to 2021

Background and Purpose: The factors associated with recovery of language domains after stroke remain uncertain. We described recovery of overall-language-ability, auditory comprehension, naming, and functional-communication across participants’ age, sex, and aphasia chronicity in a large, multilingual, international aphasia dataset. Methods: Individual participant data meta-analysis of systematically sourced aphasia datasets described overall-language ability using the Western Aphasia Battery Aphasia-Quotient; auditory comprehension by Aachen Aphasia Test (AAT) Token Test; naming by Boston Naming Test and functional-communication by AAT Spontaneous-Speech Communication subscale. Multivariable analyses regressed absolute score-changes from baseline across language domains onto covariates identified a priori in randomized controlled trials and all …

Remote Supported Communication For Adults With Chronic Aphasia: A Serendipitous Study, Allie Hopper

Theses and Dissertations--Communication Sciences and Disorders

Supported communication is defined as anything that improves access to or participation in communication events or activities (King, Simmons-Mackie, & Beukelman, 2012). This thesis describes the results of a study that took place when a training program to provide graduate students in Communication Sciences and Disorders (CSD) with “hands on” experience in providing supported communication to persons with chronic aphasia (PWA) was interrupted by the outbreak of Coronavirus-19 and switched to a remote delivery format to fulfil service and training obligations to the PWA and the CSD graduate students respectively. The study (1) describes the actions taken to covert a …

Experiences Of People With Aphasia Communicating With Healthcare Providers, Madelaine Bull

Master's Theses and Doctoral Dissertations

Aphasia is an acquired communication disorder, often resulting from a stroke, that impacts millions of Americans. People with aphasia (PWA) may frequent the hospital for a number of services poststroke and are often accompanied by their primary communication partners (PCP), the person with whom the PWA communicates with the most. This qualitative study explored the experiences of four dyads of PWA and their PCPs’ perspectives on communicating with healthcare providers (HCPs). Findings indicated that there are attributes of HCP interactions which contribute to patient-perceived success, such as collaboration with PCPs, and aphasia knowledge. These attributes were also associated with patient-centered …

Therapeutic Relationships In Aphasia Rehabilitation: Using Sociological Theories To Promote Critical Reflexivity, Felicity Bright, Stacie Attrill, Deborah Hersh

Research outputs 2014 to 2021

© 2020 The Authors. International Journal of Language & Communication Disorders published by John Wiley & Sons Ltd on behalf of Royal College of Speech and Language Therapists Background: Therapeutic relationships are fundamental in aphasia rehabilitation, influencing patient experience and outcomes. While we have good understandings of the components of therapeutic relationships, there has been little exploration of how and why therapists construct and enact relationships as they do. Sociological theories may help develop nuanced understanding of the values, assumptions and structures that influence practice, and may facilitate critical reflexivity on practice. Aims: To explore the potential for theoretical approaches …

Creating A Theoretical Framework To Underpin Discourse Assessment And Intervention In Aphasia, Lucy Dipper, Jane Marshall, Mary Boyle, Deborah Hersh, Nicola Botting, Madeline Cruice

Research outputs 2014 to 2021

Discourse (a unit of language longer than a single sentence) is fundamental to everyday communication. People with aphasia (a language impairment occurring most frequently after stroke, or other brain damage) have communication difficulties which lead to less complete, less coherent, and less complex discourse. Although there are multiple reviews of discourse assessment and an emerging evidence base for discourse intervention, there is no unified theoretical framework to underpin this research. Instead, disparate theories are recruited to explain different aspects of discourse impairment, or symptoms are reported without a hypothesis about the cause. What is needed is a theoretical framework that …

An Exploration Of The Relationship Between Aphasia Therapy, Depression And Quality Of Life In Post-Stroke Patients After Rehabilitation At 12 And 26 Weeks After Stroke: A Verse Sub-Study, Alia Rashid Khan

Theses: Doctorates and Masters

Background: Depression is a common consequence of stroke, and people with aphasia (PWA) post-stroke have a higher risk of developing depression compared to stroke survivors without aphasia. However, current stroke interventions featuring aphasia therapy tend to neglect the effect of the treatment on mood. There is also a lack of evidence on the impact of stroke education and counselling on PWA in early stroke recovery. Additionally, the research on post-stroke depression often excludes or insufficiently describes PWA in study populations. The influence of direct aphasia therapy on depression in PWA is undetermined. This sub-study investigated: i) the effect of …

The Relationship Between Narrative Informativeness And Psychosocial Outcomes In Chronic Stroke-Induced Aphasia, Eileen Armes, Jessica Richardson, Rick Arenas, Lori Nelson

Speech and Hearing Sciences ETDs

Currently there is a gap in the literature in understanding the relationship between the newly categorized primary outcome measure of discourse and secondary outcomes related to psychosocial impact, such as participation, psychological impact, social well-being, or mood. In a large sample of persons with stroke-induced aphasia (N=115), this study analyzed discourse samples using main concept analysis to determine how discourse performance correlates with the secondary outcome measures ALA, CCRSA, GDS, and CIQ. As a secondary research question, the differences in these relationships dependent on severity was also explored. Results showed statistically significant positive correlations between main concepts (MCs) and ALA …

Effects Of A Telerehabilitation Group On Continuing Language Treatment After Participation In An Intensive Comprehensive Aphasia Program (Icap), Alexis Missel

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Aphasia is an acquired neurogenic language disorder encompassing oral and/or written language expression and comprehension affecting an estimated two- to two to four million people in the United States, (Simmons-Mackie, 2018; National Aphasia Association, 2016). The primary aim of the current study was to investigate an option for targeted intervention as a follow-up to an Intensive Comprehensive Aphasia Program (ICAP). There is little research assessing maintenance of communication profile gains following conclusion of the ICAPs, and there are few options that exist as tailored ICAP follow-up programs or continued intervention guided by the ICAP principle features. To address this, a …

Diagnosing And Managing Post-Stroke Aphasia, Shannon M. Sheppard, Rajani Sebastian

Communication Sciences and Disorders Faculty Articles and Research

Introduction: Aphasia is a debilitating language disorder and even mild forms of aphasia can negatively affect functional outcomes, mood, quality of life, social participation, and the ability to return to work. Language deficits after post-stroke aphasia are heterogeneous.

Areas covered: The first part of this manuscript reviews the traditional syndrome-based classification approach as well as recent advances in aphasia classification that incorporate automatic speech recognition for aphasia classification. The second part of this manuscript reviews the behavioral approaches to aphasia treatment and recent advances such as noninvasive brain stimulation techniques and pharmacotherapy options to augment the effectiveness of …

Comparison Of High-Tech Augmentative And Alternative Communication Interfaces: Do Age And Technology Experience Matter?, Surani Gopika Nakkawita

LSU Doctoral Dissertations

Previous research has demonstrated that individuals with stroke-induced aphasia can use augmentative and alternative communication (AAC) when they cannot meet their communication needs using spoken language (Dietz, Weissling, Griffith, McKelvey, & Macke, 2014; Purdy & Van Dyke, 2011). Of the various interfaces found in the different AAC systems, the grid display and the visual scene display (VSD) have been used by individuals with aphasia (Hough & Johnson, 2009; Dietz et al., 2018). However, there is a scarcity of research examining the comparative usefulness of these interfaces.

This prospective study attempted to understand how neurologically healthy individuals of different ages and …

Empower: An Adaptable Writing Intervention, Carly Dinnes

The Nebraska Educator: A Student-Led Journal

EmPOWER is a six-stage writing intervention designed by speech-language pathologists to improve the expository writings of school-aged children with language learning and executive function disabilities. The intervention uses scaffolded instruction to transform struggling students into independent and self-regulating writers by training the students to use a variety of supports (e.g., graphic organizers, checklists) and strategies (e.g., referring back to the writing prompt) throughout the writing process. Many key features of the EmPOWER approach to writing instruction directly support components described in cognitive models of writing, which indicates that EmPOWER is a theory-guided writing intervention that may benefit a wide range …

Aphasia Friendly Medication Instructions: Effects On Comprehension In Persons With And Without Aphasia, Anna Saylor

Electronic Theses and Dissertations

Accessible health information supports people to understand and manage chronic medical conditions and is frequently presented via text. Comprehension of written health information becomes more difficult for people with language impairments, such as aphasia. Nine people with aphasia (PWA) and nine people without aphasia (PWoA), participated in this study. Each participant reviewed two unmodified medication instructions and two modified medication instructions using aphasia-friendly principles, then answered eight multiple choice questions and provided their preferences. Results showed that PWA demonstrated improved comprehension given modifications, but PWoA’s comprehension did not improve with modifications. Group comparison in the modified condition demonstrated that PWoA …

Enhancing Intergenerational Conversation Using Visual Cues: Effects Of A Historical Timeline, Allyson Lindsay

USF Tampa Graduate Theses and Dissertations

Interacting with individuals with expressive aphasia can be particularly challenging not only because of the language impairments, but also because of the frequent age difference between the clients with aphasia and student clinicians. Although students learn a variety of strategies to support language impairments, there remains a need to bridge the age gap in historical knowledge to enhance conversation. The current study explored the use of a timeline as written and pictorial cue to support conversations between individuals with aphasia and students. This study consisted of Two Experiments. The purpose of Experiment 1 was to identify the differences in knowledge …

Agrammatism And Paragrammatism: A Cortical Double Dissociation Revealed By Lesion-Symptom Mapping, William Matchin, Alexandra Basilakos, Brielle C. Stark, Dirk B. Den Ouden, Fridolin Gross, Gregory Hickok

Communication Sciences and Disorders Faculty Articles and Research

The fundamental distinction of grammatical deficits in aphasia, agrammatism and paragrammatism, was made over a century ago. However, the extent to which the agrammatism/paragrammatism distinction exists independently of differences in speech fluency has not clearly been investigated. Despite much research on agrammatism, the lesion correlates of paragrammatism are essentially unknown. Lesion-symptom mapping was used to investigate the degree to which the lesion correlates of agrammatism and paragrammatism overlap or dissociate. Four expert raters assessed videos of 53 right-handed patients with aphasia following chronic left-hemisphere stroke retelling the Cinderella story. Consensus discussion determined each subject’s classification with respect to grammatical deficits …

Revealing The Impact Of Singing In An Aphasia Group, Ava L. Barton

Senior Honors Projects, 2020-current

Aphasia is an acquired, neurogenic language disorder that affects an individual’s ability to express and comprehend language to varying degrees. Individuals with aphasia are restricted in their ability to communicate effectively and as a result, experience decreased quality of life and marked psychosocial consequences. There are numerous interventions that target the language symptoms associated with aphasia. However, social groups, such as book clubs, address both the language and psychological needs of individuals with aphasia. This project explored spontaneous moments of singing that occurred within an aphasia book club. Twenty-four moments of singing were identified and analyzed from six previously recorded …

The Effects Of Bilingualism In Post-Stroke Aphasia Patients: Clinical Implications Within The United States, Kristen Bennett

Undergraduate Honors Theses

The consistent increase of cultural diversity and immigration within the United States over the last fifty years has contributed to a societal shift towards a growing bilingual population. The growth of this population has generated a need to evaluate current assessment and treatment plans for bilingual post-stroke aphasia patients within the United States to ensure that these individuals are receiving effective healthcare. This study aims to investigate the current knowledge gap surrounding appropriate methods of assessing and treating bilingual post-stroke aphasia patients within the United States and suggest potential approaches based on existing research. In order to synthesize information regarding …

Everyday Communication Challenges In Aphasia: Descriptions Of Experiences And Coping Strategies, Tyson G. Harmon

Faculty Publications

Background: Everyday communication often occurs in situations that pose high attentional and social demands. People with aphasia have reported perceiving greater challenge communicating in these situations, but more specific information about these challenges could help clinicians and researchers work toward more meaningful intervention outcomes and increased life participation.

Aims: To explore the everyday communication experiences of people with aphasia based on their own perspectives and to identify how they report coping with everyday communication challenges.

Method: Twenty-one participants with mild or moderate aphasia completed semi-structured interviews that immediately followed the experimental arm of a larger project. Interview questions solicited descriptions …

Direct And Indirect Treatment Effects In Multilingual People With Aphasia, Aviva Lerman

Dissertations, Theses, and Capstone Projects

Background: Successfully assessing and treating aphasia in multilingual people requires a detailed understanding of the mechanisms underlying language processing in the multilingual population, and the potential impairments to those mechanisms. The balance between spreading activation of language processes via treatment and controlling interference of competing items within the lexico-semantic networks appears to be a key factor in determining whether treatment effects generalise within and across languages in multilingual people with aphasia (Kiran, Sandberg, Gray, Ascenso, & Kester, 2013).

This balance can be exploited through treatment, which, if carefully chosen, should maximise potential within- and cross-language generalisation. One treatment that has …

Legibility Of Communicative Writing And Drawing In Aphasia: Does The Orthographic Medium Matter?, Nicole Waugaman

Theses and Dissertations--Communication Sciences and Disorders

Expressive language difficulties are commonplace in aphasia and are often further complicated by co-occurring motor speech disoders. Therefore, many people with aphasia (PWA) are unable to meet all their communication needs by speaking, and they may compensate with the use of communicative writing and drawing. Communicative writing and drawing can be defined as preserved, but imperfect, orthographic skills that PWA use to compensate for expressive language deficits resulting from aphasic and/or motor speech difficulties. The purpose of this study was to determine if the orthographic medium used by a PWA to write and draw influenced the legibility of their writing …

Release: A Protocol For A Systematic Review Based, Individual Participant Data, Meta- And Network Meta-Analysis, Of Complex Speech-Language Therapy Interventions For Stroke-Related Aphasia, Marian C. Brady, Myzoon Ali, Kathryn Vandenberg, Linda J. Williams, Louise R. Williams, Masahiro Abo, Frank Becker, Audrey Bowen, Caitlin Brandenburg, Caterina Breitenstein, Stefanie Bruehl, David A. Copeland, Tamara B. Cranfill, Marie Di Pietro-Bachmann, Pamela Enderby, Joanne Fillingham, Federica Lucia Galli, Marialuisa Gandolfi, Bertrand Glize, Erin Godecke, Neil Hawkins, Katerina Hilari, Jackie Hinckley, Simon Horton, David Howard, Petra Jaecks, Elizabeth Jefferies, Luis M. T. Jesus, Maria Kambanaros, Eun Kyoung Kang, Eman M. Khedr, Anthony Pak Hin Kong, Tarja Kukkonen, Marina Laganaro, Matthew A. Lambon Ralph, Ann Charlotte Laska, Beatrice Leemann, Alexander P. Leff, Roxele R. Lima, Antje Lorenz, Brian Macwhinney, Rebecca Shisler Marshall, Flavia Mattioli, Ilknur Mavis, Marcus Meinzer, Reza Nilipour, Enrique Noe, Nam-Jong Paik, Rebecca Palmer, Ilias Papathanasiou, Brigida F. Patricio, Isabel Pavão Martins, Cathy Price, Tatjana Prizl Jakovac, Elizabeth Rochon, Miranda L. Rose, Charlotte Rosso, Ilona Rubi-Fessen, Marina B. Ruiter, Claerwen Snell, Benjamin Stahl, Jerzy P. Szaflarski, Shirley A. Thomas, Mieke Van De Sandt-Koenderman, Ineke Van Der Meulen, Evy Visch-Brink, Linda Worrall, Heather Harris Wright

HPD Articles

Background: Speech and language therapy (SLT) benefits people with aphasia following stroke. Group level summary statistics from randomised controlled trials hinder exploration of highly complex SLT interventions and a clinically relevant heterogeneous population. Creating a database of individual participant data (IPD) for people with aphasia aims to allow exploration of individual and therapy-related predictors of recovery and prognosis.

Aim: To explore the contribution that individual participant characteristics (including stroke and aphasia profiles) and SLT intervention components make to language recovery following stroke.

Methods and procedures: We will identify eligible IPD datasets (including randomised controlled trials, non-randomised comparison …

Communicating Simply, But Not Too Simply: Reporting Of Participants And Speech And Language Interventions For Aphasia After Stroke, Release Collaboration, Marian C. Brady, Myzoon Ali, Kathryn Vandenberg, Linda J. Williams, Louise R. Williams, Masahiro Abo, Frank Becker, Audrey Bowen, Caitlin Brandenburg, Caterina Breitenstein, Stefanie Bruehl, David A. Copland, Tamara B. Cranfill, Marie Di Pietro-Bachmann, Pamela Enderby, Joanne Fillingham, Federica Lucia Galli, Marialuisa Gandolfi, Bertrand Glize, Erin Godecke, Neil Hawkins, Katerina Hilari, Jacqueline Hinckley, Simon Horton, David Howard, Petra Jaecks, Elizabeth Jefferies, Luis Mt Jesus, Maria Kambanaros, Eun Kyoung Kang, Eman M. Khedr, Anthony Pak-Hin Kong, Tarja Kukkonen, Marina Laganaro, Matthew A. Lambon-Ralph, Ann Charlotte Laska, Béatrice Leemann, Alexander P. Leff, Roxele R. Lima, Antje Lorenz, Brian Macwhinney, Rebecca Shisler Marshall, Flavia Mattioli, İlknur Maviş, Marcus Meinzer, Reza Nilipour, Enrique Noé, Nam-Jong Paik, Rebecca Palmer, Ilias Papathanasiou, Brigida F. Patricio, Isabel Pavão Martins, Cathy Price, Tatjana Prizl Jakovac, Elizabeth Rochon, Miranda L. Rose, Charlotte Rosso, Ilona Rubi-Fessen, Marina B. Ruiter, Claerwen Snell, Benjamin Stahl, Jerzy P. Szaflarski, Shirley A. Thomas, Mieke Van De Sandt-Koenderman, Ineke Van Der Meulen, Evy Visch-Brink, Linda Worrall, Heather Harris Wright

Research outputs 2014 to 2021

Purpose: Speech and language pathology (SLP) for aphasia is a complex intervention delivered to a heterogeneous population within diverse settings. Simplistic descriptions of participants and interventions in research hinder replication, interpretation of results, guideline and research developments through secondary data analyses. This study aimed to describe the availability of participant and intervention descriptors in existing aphasia research datasets.

Method: We systematically identified aphasia research datasets containing ≥10 participants with information on time since stroke and language ability. We extracted participant and SLP intervention descriptions and considered the availability of data compared to historical and current reporting standards. We developed an …

Reliability And Stability Of The Metrical Stress Effect On Segmental Production Accuracy In Persons With Apraxia Of Speech, Dallin J. Bailey, Lisa Bunker, Shannon Mauszycki, Julie L. Wambaugh

Faculty Publications

Background Acquired apraxia of speech (AOS) involves speech-production deficits on both the segmental and suprasegmental levels. Recent research has identified a non-linear interaction between the metrical structure of bisyllabic words and word-production accuracy in German speakers with AOS, with trochaic words (strong–weak stress) being resistant to errors compared with iambic words (weak–strong).

Aims To replicate previous findings in English speakers with AOS, to measure the test–retest reliability of the effect, and to examine the potential impact of different methods of word scoring.

Methods & Procedures Speech samples were collected from 27 speakers with AOS and aphasia. Participants were at least …

Neurocognitive Basis Of Repetition Deficits In Primary Progressive Aphasia, Sladjana Lukic, Maria Luisa Mandelli, Ariane Welch, Kesshi Jordan, Wendy Shwe, John Neuhaus, Zachary Miller, H. Isabel Hubbard, Maya Henry, Bruce L. Miller, Nina F. Dronkers, Maria Luisa Gorno-Tempini

Communication Sciences and Disorders Faculty Publications

Previous studies indicate that repetition is affected in primary progressive aphasia (PPA), particularly in the logopenic variant, due to limited auditory-verbal short-term memory (avSTM). We tested repetition of phrases varied by length (short, long) and meaning (meaningful, non-meaningful) in 58 participants (22 logopenic, 19 nonfluent, and 17 semantic variants) and 21 healthy controls using a modified Bayles repetition test. We evaluated the relation between cortical thickness and repetition performance and whether sub-scores could discriminate PPA variants.

Logopenic participants showed impaired repetition across all phrases, specifically in repeating long phrases and any phrases that were non-meaningful. Nonfluent, semantic, and healthy control …