Table 1.

Inter-subject Spearman correlations of α^{{LF, HF}} and ${\alpha }_k^{\left\{\text{LF},\text{HF}\right\}}$ obtained in the different stages of the protocol.

	α and αk		$\overline{\alpha }$ and ${\overline{\alpha }}_k$		${\overline{\alpha }}^{\gamma }$ and ${\overline{\alpha }}_k^{\gamma }$
k	LF	HF	LF	HF	LF	HF
PUS	0.81	0.80	0.74	0.76	0.74	0.81
A1	0.80	0.87	0.69	0.80	0.69	0.76
PA	0.77	0.79	0.67	0.79	0.67	–
A12	0.61	0.68	0.50	0.62	0.50	0.61
T12	0.48	0.53	0.48	0.61	0.48	0.56
PW	0.32	0.48	0.14	0.49	0.14	0.36
PSTT	0.48	0.36	0.39	0.27	0.39	0.29
C2	0.39	0.50	0.17	0.30	0.17	–
T13	0.20	0.18	0.14	0.10	0.14	–
C1	0.31	0.24	0.36	0.35	0.36	–
B1	0.03	0.02	0.10	0.05	0.10	–0.06

In addition, inter-subject Spearman correlations of medians of ${\overline{\alpha }}^{\left\{\text{LF},\text{HF}\right\}}$ and ${\overline{\alpha }}_k^{\left\{\text{LF},\text{HF}\right\}}$ obtained in the different stages of the protocol are also shown, as well as the inter-subject Spearman correlations of medians of ${\overline{\alpha }}^{\left\{{\text{LF}}_{\gamma },{\text{HF}}_{\gamma }\right\}}$ and ${\overline{\alpha }}_k^{\left\{{\text{LF}}_{\gamma },{\text{HF}}_{\gamma }\right\}}$.