Like the few studies looking at the effects of Internet use on brain measures during adolescence, some studies of musi-cal training compare the brains of the extreme end of the population (professional musicians) with the brains of non-musicians. However, some of these studies have adopted methods to measure how musical training in nonprofes-sionals relates to brain measures, behavior, and cognition in both developing populations and adults [13,14]. These studies have largely adopted such methods to investigate whether there are particular developmental windows when musical training results in greater or fundamentally different effects. By collecting self-reported measures of the age at which participants began their musical training, as well as the duration and intensity of musical training, these studies are able to distinguish between training and maturational effects [13,14]. It might be possible to adopt similar methods in future investigations of Internet use and its subcomponents. This could help clarify if aspects of Internet use during adolescence impact brain measures, behavior, and cognition in a fundamentally different way from Internet use in adulthood.