How does our brain respond when we perceive a beat?
Stimuli
These stimuli were used in a rhythm reproduction task and an fMRI discrimination task. (Grahn and Brett, 2007)
The metric simple and complex rhythms are composed of intervals related by integer-ratios (1:2:3:4), whereas nonmetric use noninteger-ratios (1:1.4:3.5:4.5).
The metric simple rhythms also have a regular grouping which induces a stronger perception of a beat than in the metric complex rhythms. As the behavioural data show below, integer-ratios are not enough to lead to better rhythm performance--regular grouping is also required.
These stimuli were used in a rhythm reproduction task and an fMRI discrimination task. (Grahn and Brett, 2007)
The metric simple and complex rhythms are composed of intervals related by integer-ratios (1:2:3:4), whereas nonmetric use noninteger-ratios (1:1.4:3.5:4.5).
The metric simple rhythms also have a regular grouping which induces a stronger perception of a beat than in the metric complex rhythms. As the behavioural data show below, integer-ratios are not enough to lead to better rhythm performance--regular grouping is also required.
