Our methodological approach and data processing pipeline provide some general guidelines for constraining future studies of oscillatory feedback processing in children and adolescents. They suggest that a more fine-grained look at the theta band, in terms of frequency and time, may provide a window into subcomponent processes within feedback processing and in relation to age trends. A growing body of work implicates the FRN as a marker of depressive symptoms (Foti & Hajcak, 2009) and also a correlate of risk taking (Crowley et al., 2009). Possibly, these effects reflect a common aspect of hedonic function. We have identified consistent sources of variation in the theta band for reward feedback in both ITC and less strongly for ERSP, that could serve as starting points for examination as neural correlates of hedonic function and phenotypic expression across development.
