[Eeglablist] ERSP comparisons

[Dott. Stefania Costa Neurofisiologia]

dear all user,

i need an help!when i compute ERSP comparisons between two conditions, i 
obtain 3 plots: ERSP on condition 1, ERSP on condition 2 and ERSP 
difference.
sometime, it seems that, for a specific time point and estimate of 
linear-spaced frequency, there are marked differences; indeed, that 
differences are not correctly detected.
i don't understand very well the bootstrap method for significance, and 
i think that some bias can derive from "common baseline computing".
i wish ask EEGLab user an alternative method to detect that differences,
thank you,

Stefania Costa, PhD student
Department oh Human Physiology and Pharmachology,
Rome,ITALY