I am a student in electrical and electronics engineering. I just started working with EEG. I perform a stress test on subjects and record EEG activities with a 5-sensor headset. I use Matlab for analysis. I'm wondering if anyone can tell me the best method for data analysis. Do we expect the signal to be localized at a certain frequency range in the EEG data under stress stimulus? If so, what is the frequency range? Which filter should be applied to the EEG signal for the stress stimulus?