Table 3.

Mixed-effect model for stiffness Ky component at the start of the movement

Model:
area ∼ 1 + velocity + reward + (1 | participant)
No. of observations	40	AIC	1000.4
Fixed effects coefficients	3	BIC	1008.9
Random effects coefficients	20	Log-likelihood	−495.22
Covariance parameters	2	Deviance	990.45
Fixed effects coefficients (95% CIs):
Variable	Estimate	SE	t statistic	df	p value	Lower	Upper
Intercept	176720	105090	1.6817	37	0.10106	−36206	389640
Velocity	−34147	106840	−0.3196	37	0.75107	−250630	182330
Reward	11547	12086	0.95537	37	0.34559	−12942	36036
Random effects covariance parameters (95% CIs):
Variable	Levels	Type	Estimate	Lower	Upper
Participant	20	SD	104260	75922	143160
Error	NA	Residual SD	22268	16332	30360