Aphasia, Stroke
Conditions
Brief summary
Aphasia is a language disorder caused by stroke and other acquired brain injuries that affects over two million people in the United States and which interferes with life participation and quality of life. Anomia (i.e., word- finding difficulty) is a primary frustration for people with aphasia. Picture-based naming treatments for anomia are widely used in aphasia rehabilitation, but current treatment approaches do not address the long-term retention of naming abilities and do not focus on using these naming abilities in daily life. The current research aims to evaluate novel anomia treatment approaches to improve long-term retention and generalization to everyday life. This study is one of two that are part of a larger grant. This record is for sub-study 1, which will adaptively balance effort and accuracy using speeded naming deadlines.
Detailed description
Study 1: Evaluate the benefits of balancing effortful and errorless learning via adaptive naming deadlines. * Study design: The investigators will enroll 30 people with aphasia in a randomized within-subjects crossover design comparing trained words in three retrieval conditions. Stimuli will be balanced across conditions using an established item-response theory algorithm developed by Dr. Hula (consultant). Participants will receive 8 sessions of treatment per condition (2x/ week for 4 weeks), with probes administered at baseline and 1 week, 3 months, and 6 months post-treatment. Condition treatment order will be randomly assigned and counter- balanced across participants. In total, Sub-study 1 includes typically 3-4 (but up to 6) assessment sessions, 24 treatment sessions, and 24 baseline and follow-up probe assessment sessions per participant over an approximately 10-month period, but up to 18 months. Data collection will take place at the Language Rehabilitation and Cognition Laboratory (LRCL) at the University of Pittsburgh, in participants' homes, or in private rooms in public spaces (e.g. libraries, community centers). * Participants: The investigators will recruit 30 male and female community-dwelling people with aphasia \>6 months post- onset of aphasia due to left-hemisphere ischemic or hemorrhagic stroke. Aphasia diagnosis will be confirmed by Comprehensive Aphasia Test (CAT) performance and medical history. Investigators will exclude potential participants with a history of other acquired or progressive neurological disease, significant language comprehension impairments, unmanaged drug/alcohol dependence, and severe diagnosed mood or behavioral disorders that require specialized mental health interventions. * Assessment Procedures: Participants will be tested on a comprehensive initial battery of standardized assessments characterizing their aphasia severity and overall language profile, naming and discourse abilities, semantic processing, verbal short-term and working memory at baseline. Patient-reported measures of treatment motivation and pre-post changes in communication effectiveness will also be measured in response to each treatment condition. These tests will ensure that our participants well-characterized from a behavioral perspective, and measures will be used in secondary analyses and model development exploring predictors of treatment response. * Treatment description: Each training trial will consist of a fixation cross and picture presentation. A repetition cue (audio recording and written from of the target) will be provided to participants based on the deadlines described above. Participants will be instructed to name the picture and indicate when they have given their final answer via key press, with responses also timed and scored by clinician key press. In the errorless condition, they will be instructed to repeat the target, while in the other conditions they will be asked to try to name the picture independently before they hear the target. Once they have indicated that they have provided their final answer, they will receive accuracy feedback on the computer screen based on clinician scoring. To maximize the clinical relevance of this study, investigators will control total amount of treatment time (8 hours) between conditions, instead of controlling the total number of trials. This is because many more trials can be completed per hour in the errorless or balanced conditions compared to the effort-maximized condition, and investigators want study outcomes to practically inform clinicians on how best to spend limited treatment time.
Interventions
BEHAVIORALAccuracy-maximized condition
Naming treatment condition in which the target will be immediately provided for repetition at picture onset.
BEHAVIORALEffort-maximized condition
Naming treatment condition in which participants will have up to 10 seconds to respond before the target is provided for repetition.
BEHAVIORALEffort-accuracy balanced condition
Naming treatment condition in which naming deadlines will be determined based on the balanced effort-to-accuracy benefit ratio formalized above, calculated on clinician-provided accuracy and response time ratings. Deadlines will be recalculated session-by-session to adjust to participant-specific treatment gains over time.
Sponsors
University of Pittsburgh
University of Massachusetts, Amherst
National Institute on Deafness and Other Communication Disorders (NIDCD)
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Masking description
Research assistants responsible for coding data will be masked to treatment condition.
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Existing diagnosis of chronic (\>6 months) aphasia subsequent to left hemisphere ischemic or hemorrhagic stroke. * Impaired performance on 2/8 sections of the Comprehensive Aphasia Test.
Exclusion criteria
* History of other acquired or progressive neurological disease. * Significant language comprehension impairments * Unmanaged drug / alcohol dependence. * Severe diagnosed mood or behavioral disorders that require specialize mental health interventions.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in correct responses in Confrontation Naming of Treated Pictured Objects | Initial assessment (pre-treatment), 3 months post-treatment | Confrontation naming accuracy of pictures targeted in each training condition will serve as a primary outcome. Individualized lists for each participant will be selected from a corpus of pictured objects. Performance will be evaluated twice at each timepoint. Change in performance from initial assessment to the 3-month follow-up timepoint on the treated items will serve as the primary outcome measure. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in correct responses in Confrontation Naming of Untreated Pictured Objects | Initial assessment (pre-treatment), 3 months post-treatment | Confrontation naming accuracy of pictured untreated items (matched for linguistic difficulty to treated items in the primary outcome) for each training condition will serve as a secondary outcome control condition. |
| Change in correct responses in Context Generalization of Treated and Untreated Pictured Objects | Initial assessment (pre-treatment), 3 months post-treatment | Production of trained words on the context generalization complex scene description task for each training condition and corresponding untreated items will serve as a secondary outcome. Words from complex scenes and wordless picture books will be chosen for each participant. These words will consist of a subset of those selected for confrontation naming. Performance will be evaluated twice at each timepoint. Change in performance from initial assessment to the 3-month follow-up timepoint on the treated and untreated items will serve as a secondary outcome measure. |
| Change in core lexicon analysis on the Aphasia Bank Discourse Protocol | Initial assessment (pre-treatment), 3-months post-treatment | The Aphasia Bank Discourse Protocol is a brief, but thorough set of language tasks which will characterize participants' language at the discourse level. The protocol requires participants to generate discourse samples within the contexts of free speech, a picture description, a story narrative, and procedural discourse. Change in performance in core lexicon analysis on discourse samples from initial assessment to each post-treatment follow up timepoint will serve as a secondary outcome measure. |
| Change in mean scores on the Aphasia Communication Outcome Measure Short-Form | Initial assessment (pre-treatment), 1 week post-treatment. | The Aphasia Communication Outcome Measure (ACOM) is a measure of patient-reported "communication functioning," defined as the ability to effectively convey and receive personally relevant messages in natural environments. Results are provided in T scores (sample mean of 50 with a standard deviations of 10), with higher scores indicating better communication functioning. |
| Score on the Adapted Intrinsic Motivation Inventory for Aphasia | 1 week post-treatment | The adapted intrinsic motivation Inventory for aphasia is a brief instrument comprised of 7 subscales with a total of 45 items intended to characterize intrinsic motivation in people with aphasia. Each item is scored on a scale of 1-7. Higher total score is associated with higher intrinsic motivation. |
Countries
United States
Contacts
CONTACTAlyssa Kelly, M.A., CCC-SLP
PRINCIPAL_INVESTIGATORWilliam Evans, PhD
University of Pittsburgh
Outcome results
None listed