Not as much as an answer but a question first. I take it the car in resting state segment is baseline averaged with your "bumps" potential. I had a problem in anaysing evoked potential data where artifact or worse "missing data" was present. spss would assign 0 to missing data and bmdp just did a general mean averabe therefore with assistance the math guy in the department we / he designed an algorithym of a zero to next peak analysis. not that simple pretty close. i will check back later this may not be applcable to your situation. lx

Not as much as an answer but a question first. I take it the car in the resting state segment is the baseline averaged with your "bumps" potential. I had a problem in anaysing evoked potential data where artifacts, or worse "missing data", were present. SPSS would assign 0 to missing data and bmdp just did a general mean average, therefore with assistance from the math guy in the department we / he designed an algorithm of a zero to next peak analysis. It was not that simple, but pretty close. I will check back later this may not be applicable to your situation.