“…Singing is a universal human activity that is considered to be one of the most natural means of human expression (Lomax, 1968; Nettl, 2015). For example, children have a natural tendency to sing spontaneously early in development (Dalla Bella, Giguère, & Peretz, 2007), and several studies have sought to analyze the products of children’s vocal improvisations (e.g., Campbell, 1998; Cohen, 2011; Moog, 1976; Moorhead & Pond, 1978; Raju & Ross, 2012; Raju et al, 2015; Sundin, 1997; Young, 2002). Even though singing begins naturally as a process of vocal play during the early years of life, not all individuals continue to sing or make music after childhood (Nordoff & Robbins, 1983).…”