Validation in Principal Components Analysis Applied to EEG Data

Table 1

Loadings matrix showing the coefficients for the first two PCs in a PCA of 10 variables, relating to EEG signals from 24 volunteers.

Variables	1° PC	2° PC
Alpha power	−0.33	0.10
Beta power	−0.29	0.57
Theta power	−0.31	−0.38
Alpha max.	−0.32	0.10
Beta max.	−0.30	0.51
Theta max.	−0.30	−0.43
RMS	−0.33	−0.09
SD	−0.33	−0.09
Skewness	−0.29	−0.21
Mm	−0.34	−0.06