Table 2.

Correlation matrix.

	SWAN I	SWAN C	CONG	INC	RT CONG	RT INC	RTV CONG	RTV INC	RTD
VS	−0.41***	−0.42***	0.32**	0.15	−0.12	−0.057	−0.43***	−0.34**	0.22*
SWAN I		0.95***	−0.21	−0.13	0.084	0.0057	0.23*	0.18	−0.15
SWAN C			−0.19	−0.075	0.12	0.0085	0.27*	0.2	−0.22
CONG				0.81***	0.27*	0.34**	−0.41***	−0.62***	0.32**
INC					0.63***	0.6***	−0.057	−0.4***	0.13
RT CONG						0.94***	0.55***	0.23*	0.069
RT INC							0.47***	0.2	0.37***
RTV CONG								0.7***	−0.11
RTV INC									−0.075

It should be noted that bigger scores in the SWAN I and SWAN H scales are associated with poorer attention and higher hyperactivity respectively; both these variables are negatively correlated with the ability to synchronize. Higher variability in reaction time has also been associated with poorer attention. Individual correlations:

^*p < 0.05,

^**p < 0.01,

^***p < 0.001.