Before revision:  Interestingly, because pre-whitening in FSL and SPM does not remove a substantial part of the temporal autocorrelation in the noise, we observed a relationship that the lower the assumed experimental design frequency, the more likely it was to observe significant activation.
After revision:  Interestingly, because pre-whitening in FSL and SPM does not remove a substantial part of the temporal autocorrelation in the noise, we found a strong relationship in which the lower the assumed experimental design frequency, the more likely it was to observe significant activation.