Micro-flexions (>1 Hz) occur more frequently in the immobile condition than the expressive condition¶

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

Subclaims¶

q2 i? Phase counts above 1 Hz are significantly higher when players are instructed to stay still (χ2 = 31.49, p < 0.001). → 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 · i? · causal · r2

Poisson-regression ANOVA on weighted phase counts comparing immobile and expressive conditions; the article reports "χ2 = 31.49, p < 0.001". A Wilcoxon signed-rank test on phase changes per second confirmed it (p < 0.001).

"The analysis of the phase counts revealed that for the IMO condition countings were significantly higher than for the EXP condition ( χ2 = 31.49, p < 0.001, using ANOVA via Poisson regression with phase counts weighted according to performance duration)."

Discussion¶

Related Claims¶

• Passages of higher rhythmical density elicit more frequent but smaller knee flexions than lower-density passages — 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 — related
• Rhythmical density correlates negatively with knee movement amplitude and positively with flexion frequency — related