Experimental evidence for synchronization to a musical beat in a nonhuman animal.
Level 5 - mechanism / opinion, no new human data
Single-subject experimental animal study
PubMed 19409790 · doi:10.1016/j.cub.2009.03.038
What was done
Researchers tested beat synchronization in a single sulphur-crested cockatoo (Cacatua galerita eleonora) to evaluate the vocal learning and rhythmic synchronization hypothesis. The tempo of a musical excerpt was manipulated across a wide range while observing whether the bird adjusted the tempo of its rhythmic movements to match the beat.
What was found
The abstract reports no numerical values, exact tempos, or statistical measures. It reports that the animal spontaneously adjusted the tempo of its rhythmic movements to remain synchronized with the musical beat across the manipulated range.
Why it matters
This demonstrates that movement synchronization to a musical beat is not unique to humans. It supports the hypothesis that rhythmic beat entrainment shares neural mechanisms with complex vocal learning.
Limits
The study includes only a single animal (n = 1), preventing generalization across species or individuals. The abstract does not provide quantitative metrics of synchronization accuracy, phase consistency, or tempo boundaries.