Table 2.

Partial correlations (controlling for Age) between spindle densities (spindles/minute) and processing speed, organized by frequency and sleep stage.

	Stage 2	SWS	REM
C3 11.00–13.5 Hz	0.47*	0.09	0.42*
C3 13.5–16 Hz	−0.04	−0.01	0.43*
FZ 13.5–16 Hz	0.03	0.01	0.53*
C3 16–18.5 Hz	0.33	0.45*	0.19
C4 16–18.5 Hz	0.26	0.32*	0.17
FZ 16–18.5 Hz	0.27	0.37*	0.31
PZ 16–18.5 Hz	0.22	0.46*	0.08

*p < 0.05.