Isolating the effect of beat salience on rhythmic auditory stimulation outcomes
I am a PhD student in the Cognitive, Developmental, & Brain Sciences area of the Psychology department at Western University. I completed my MSc at the Music, Mind, and Brain program at Goldsmiths in London, UK. Before my master’s, I lived in Walla Walla, Washington, where I received my BA in music performance and psychology and did research in music cognition. Currently, I’m interested in examining the neural mechanisms of disordered gait in Parkinson’s disease and how these can inform gait rehabilitation via music-based rhythmic auditory stimulation.
Isolating the effect of beat salience on rhythmic auditory stimulation outcomes
Rhythmic auditory stimulation (RAS) is a promising intervention for gait-disordered populations that involves synchronizing footsteps to regular auditory cues. Previous research has shown that high-groove music elicits improved gait relative to low-groove music, but how this effect occurs is unclear. It is possible that the greater beat clarity (i.e. beat salience) associated with high-groove music may improve gait because more salient beats are easier to synchronize with. In the current study, we explicitly manipulated beat salience by overlaying metronome tones on high- and low-groove music clips. We expected that low-groove music with metronome embedded would show similar gait improvements as high-groove music, specifically that stride length and velocity would increase and balance would not be compromised. Preliminary analyses on a healthy adult population indicate that, although the positive effects of high-groove music on gait were replicated, embedding metronome tones did not significantly increase stride length or velocity relative to non-embedded versions. This result suggests that beat salience may not be primarily responsible for gait improvements from high-groove stimuli. Future studies can characterize this response in clinical populations, as well as investigate other mechanisms responsible for gait improvement in high-groove music in order to improve future RAS outcomes.