Table A1.

Measure: $k_1^{\left(1\right)}$

Factor	Sum of Squares	df	Mean Square	F	Sig.
Local friction (LF)
Sphericity assumed	0.065	1	0.065	16.498	0.005
Greenhouse–Geisser	0.065	1.000	0.065	16.498	0.005
Friction at other digits (FOD)
Sphericity assumed	0.009	3	0.003	6.406	0.003
Greenhouse–Geisser	0.009	2.530	0.004	6.406	0.005
LF × FOD
Sphericity assumed	0.001	3	0.000	0.800	0.508
Greenhouse–Geisser	0.001	2.068	0.001	0.800	0.472