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What is your resolution, TR, and number of time points per run? Did you use one long run or concatenate across runs? Smoothing would only decrease gaussian noise, which ICA is trying not to put into components to begin with. Peace, Matt. On 5/9/14, 10:45 AM, "SUBSCRIBE FSL Anonymous" <[log in to unmask]> wrote: >Thanks Christian! > >Ok, that makes sense. Somehow I had imagined smoothing would have the >opposite effect by decreasing noise sources... > >On to my next worry: From what I've seen people generally get many fewer >components, also with spatially smoothed data. My dataset is pretty >standard, although the stimuli are very complex (movies). Does anyone >have any ideas about why I get so many more components than other people? >I'm worried I've made some mistake. Or doesn't this happen sometimes and >it's just that I haven't heard of it in the literature? I'm pretty new to >this method. > >Many thanks! >Kajsa