Rhythmical density correlates negatively with knee movement amplitude and positively with flexion frequency¶

Claim · All claims
Evidence · 1 study · associational r2 · q2 · i3 large
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i3 L2 norm scores correlate with rhythmical density at r = −0.7 and phase changes at r = 0.63, both p < 0.0001. → Moura 2023

Evidence¶

Moura 2023¶

Moura, N., Vidal, M., Aguilera, A. M., Vilas-Boas, J. P., Serra, S. & Leman, M. (2023). Knee flexion of saxophone players anticipates tonal context of music. npj Science of Learning 8:22. https://doi.org/10.1038/s41539-023-00172-z

q2 · i3 · associational · r2

Correlational analysis of smoothed knee curves (functional PCA smoothing) against rhythmical density profiles in the expressive condition; the article reports "r = − 0.7" and "r = 0.63", both p < 0.0001.

"Pearson correlation coefficient is r = − 0.7, p < 0.0001 for the L2 norm scores and r = 0.63, p < 0.0001 for the phase changes (Fig. 1c) with regard to the rhythmical density scores"

Discussion¶

Related Claims¶

• Passages of higher rhythmical density elicit more frequent but smaller knee flexions than lower-density passages — a narrower finding that bears on this claim
• Micro-flexions (>1 Hz) occur more frequently in the immobile condition than the expressive condition — related
• Knee flexion causally predicts pitch expectation in expressive playing (Granger causality) — related
• Knee flexion also predicts pitch expectation when players are instructed to be immobile