afni.nimh.nih.gov

Those 0's will change the correlation because the time series does not have mean==0.

If you pre-process the correlations (de-mean and scale so sum squares == 0), then correlations are dot products.
The errts time series has mean==0, and the zeros do not affect scaling or the dot products. So the censored time points should not affect the correlations.

Remove the means of the time series before inserting the zeros and try again.

- rick