Effect of Community Choir Singing in People With Chronic Post-stroke Aphasia

Description of study population Additional information: Participants with chronic aphasia due to stroke will be recruited from four participating centers in Canada and the United States.

Study design Additional information: A parallel group randomized trial design with a secondary crossover extension was chosen for this study to offer the intervention to all participants. Participants will be randomized in a 1:1 ratio to two study arms (AB/BA, A = 12 weekly choir sessions and home singing training, B = usual care) stratified for aphasia severity (according to the Quick Aphasia Battery overall score), age, time since last stroke and their interest in music (according to the Barcelona Music Reward Questionnaire). Measures at the "macro" level will be collected at Baseline, Completion and 2-months Follow-up time points for each group. At the "micro" level (i.e., at choir sessions 2, 6, 10 and 12) data will be collected during as well as pre and post choir-singing.

Intervention Additional information: The repertoire in the comunity choir activity will consist of popular songs in English or French. Half of the songs will be pre-determined and half will be chosen by the choir members from a list, based on a vote during the first week of the intervention. Eligible songs will remain within the range of an octave and include a variety of tempi (but fast tempi will be slowed down if needed to facilitate word production). Depending on the group's abilities, the Choir Director will decide in which keys the songs will be performed, and whether they will be sung in unison or with simple harmonies. Songs in canon will be included in the predetermined repertoire to easily create harmonies. Each session will include (in this order): 15 minutes for vocal warm-up; 25 minutes of work on the song repertoire; 20 minutes for a social break with refreshments.

For the home training, participants will be instructed to sing at home with a video guide on an online platform. Each home training session will include (in this order): 10 minutes for vocal warm-up; and 20 minutes sing-along using songs of the repertoire. Song lyrics will be displayed on the video.

To monitor the usual care, each participant (and/or caregiver) will complete a form and/or have a weekly 5-15-minute phone/Zoom call with a research assistant to collect the usual care data including type and time spent in social activities and rehabilitation services, as well as adverse events.