Yet there are many considerations of which one should be mindful when using rs-fcMRI in developmental studies. While there is no “task” per se during rest, these analyses do require the subjects to be still, which may be harder for some subject groups than others. The results discussed in this review used a variety of motion correction approaches. In some, groups of adults and children were matched for movement (Fair et al. 2007, 2009; Church et al. 2009a), while in others data was corrected for movement frame by frame (Fair et al. 2007, 2009; Church et al. 2009a) or with a six parameter movement regression (Kelly et al. 2009). Some authors also did a “visual inspection” of movement effects (Kelly et al. 2009). Efforts to remove the effect of movement are particularly important given the principles of segregation and integration. Movement increases the noise in the signal, making long distance correlations more difficult to detect (Fair et al. 2007).
