Auditory Masking Effects on Speech Fluency in Aphasia and Apraxia of Speech

Completed

Phase N/A Results N/A

Eligibility Criteria

Inclusion Criteria for Aphasic/Apraxic Participants:
- Single left-hemisphere cerebrovascular accident
- Speech errors are present, but participant is able to produce approximations of words or sentences by reading or repetition; < 90% and > 10% on Chapel Hill Multilingual Intelligibility Test (Haley, 2011)
- Right-handed prior to stroke by report
- Normal visual attention, acuity, and color vision
- Pure-tone threshold <= 40 decibels in at least one ear
Exclusion Criteria for Aphasic/Apraxic Participants:
- Predominating disorders of cognition or hearing (e.g. dementia, hearing impairment).
- Presence of degenerative neurological illness (e.g. Parkinson's disease, amyotrophic lateral sclerosis, primary progressive aphasia).
Inclusion Criteria for Neurologically Healthy Participants:
- Matched in age and sex to a participant with aphasia
- score of 90% or higher on the single-word intelligibility test
- Right-handed prior to stroke by report
- Normal visual attention, acuity, and color vision
- Pure-tone threshold <= 40 decibels in at least one ear
Exclusion Criteria for Neurologically Healthy Participants:
- History of stroke
- History of developmental speech or language disorder