Table 2. Results of a stepwise multiple regression predicting the MIDI velocity of the individual keystrokes.

		Kinematics of the striking finger at the moment of a keypress						Correlation coefficient of the finger movements during two successive keystrokes
								between a striking finger and the first finger from the radial			between a striking finger and the second finger from the radial			between a striking finger and the third finger from the radial
		Joint angle			Joint angular velocity			Joint angular velocity			Joint angular velocity			Joint angular velocity
		DIP	PIP	MCP	DIP	PIP	MCP	DIP	PIP	MCP	DIP	PIP	MCP	DIP	PIP	MCP
Secondstrike	coef.	0.035	-0.077	-0.062	0.122	-0.027	-0.302	0.127	0.000	-0.086	-0.010	-0.040	0.016	0.013	-0.054	-0.009
	p	0.665	0.344	0.446	0.146	0.742	0.000	0.125	0.996	0.310	0.901	0.626	0.840	0.871	0.506	0.913
Third strike	coef.	-0.201	0.069	-0.009	-0.145	0.051	0.091	-0.030	0.145	0.001	-0.124	0.050	0.024	-0.004	0.038	0.046
	p	0.017	0.434	0.918	0.103	0.547	0.284	0.723	0.086	0.994	0.142	0.555	0.778	0.966	0.653	0.587
Fourth strike	coef.	0.094	-0.030	-0.055	-0.171	0.017	0.058	0.085	0.083	0.089	-0.071	0.088	-0.001	0.015	0.122	0.107
	p	0.273	0.727	0.512	0.044	0.841	0.517	0.312	0.328	0.292	0.402	0.294	0.988	0.861	0.155	0.206
Fifth strike	coef.	-0.117	-0.064	0.126	-0.016	-0.262	-0.214	0.058	-0.161	-0.043	-0.092	0.013	-0.034	0.009	0.042	-0.057
	p	0.154	0.437	0.179	0.849	0.002	0.011	0.477	0.073	0.619	0.274	0.871	0.688	0.910	0.620	0.486
Sixth strike	coef.	0.004	-0.187	0.099	0.000	-0.006	-0.228	-0.020	-0.003	0.088	0.020	0.010	0.093	0.011	0.105	0.070
	p	0.965	0.024	0.232	0.996	0.944	0.006	0.805	0.967	0.292	0.813	0.903	0.280	0.900	0.206	0.400
Seventh strike	coef.	0.022	-0.022	0.002	0.082	-0.109	0.016	0.022	-0.003	-0.098	-0.036	0.007	0.092	0.066	0.022	-0.137
	p	0.793	0.800	0.985	0.338	0.202	0.849	0.800	0.968	0.251	0.674	0.938	0.278	0.438	0.793	0.107
Eighth strike	coef.	0.244	0.074	0.123	-0.120	-0.079	-0.047	-0.075	0.090	-0.076	0.154	0.056	0.051	-0.063	-0.173	-0.188
	p	0.003	0.465	0.138	0.141	0.329	0.572	0.348	0.273	0.358	0.055	0.539	0.536	0.440	0.034	0.022

A number in bold indicates p < 0.05.

Here, the first strike was not analyzed because the movement correlation was computed during a period between the target strike and its preceding strike.