I need help with the double subtraction method which is something I have never done before.
I would like to examine the Lateralized Readiness Potential for each subject evoked: One for left responses and one for right responses.
Now, I want to apply the double subtraction method (De Jong et al., 1998) to calculate the LRP but I am unsure how. I want to make the following calculation:
(C3’(t) – C4’(t)) right hand - (C3‘(t) – C4‘(t)) left hand
So, within the “right hand evoked”, I want to have the signal from the C3 minus the C4. We want to make the same difference wave within the “left hand evoked”. Then, I want to subtract the right-hand difference wave from the left-hand difference wave.
I would be grateful for any help!