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Dear all, Two very naive questions: In my experiment subjects only rarely made a mistake (2-5% errors) and therefore I'm not interested in analyzing error related activity. But how should I treat these trials when specifying the first level design? At the moment I just don't specify any events in case of an error but perhaps it's more sound to have an error regressor? Furthermore I know that people tend to discard "the first few scans" to allow for saturation effects. Am I correct in assuming that this means the first few scans of each run (of about 10-12 minutes)? And does it make a difference whether the discarding is done before or after preprocessing? Any advice is much appreciated! Best regards, Roos