“…This is a serious limitation, as adolescence in particular is a period during which music plays a major role, and has been shown to serve as a medium for adolescents' emotional self-regulation, peer-group affiliation, and identity formation (Arnett 1995;Behne 1997;Laiho 2004;North, et al, 2000;Saarikallio and Erkkilä 2007). The particular ability to perceive emotion in music begins to develop early, with 5-7-month-olds already showing a preference for happy over sad expression (Nawrot 2003), three-year-olds distinguishing between happy and sad music (Kastner and Crowder 1990), and 4-6-year olds correctly identifying happiness, sadness, anger, and fear in music (Dolgin and Adelson 1990;Cunningham and Sterling 1988). Regarding emotion expression, children as young as four are able to manipulate tempo, dynamics, and pitch to create happy or sad expression (Adachi and Trehub 1998).…”