Components of skin impedance level

Eighty students were trained on a maze-like ballboard over a series of 24 trials, while the skin impedance level was recorded from the palmar and dorsal sides of their fingers. A principal component analysis of the cross-products for the palmar and dorsal data treated separately resulted in two components for the palmar data (55% and 25% of variance) and one component for the dorsal data (80% of variance) and thus supported Edelberg's findings.