“…In particular, enculturated familiarity with music showing mildly complex rhythmic ratios such as 2:2:3 can positively override the potential difficulty of processing such rhythms. 1 These rhythms are relatively difficult for North Americans to perceive (Repp, London, & Keller, 2005;Snyder, Hannon, Large, & Christiansen, 2006), but not for participants with Balkan, Turkish, or Indian backgrounds (Hannon, Soley, & Ullal-Gupta, 2012;Kalender, Trehub, & Schellenberg, 2013;Ullal-Gupta, Hannon, & Snyder, 2014), as the music in these countries more prominently features such rhythmic patterns, nor for very young North American infants, suggesting that the adult North Americans' bias towards isochronous meters reflect their specific enculturation rather than a biological predisposition (Hannon & Trehub, 2005a). Infants and young children can easily learn to perceive these kinds of complex rhythms as a result of passive exposure; such learning is achieved less rapidly and fluently by older children and adults (Hannon & Trehub, 2005b;Hannon, Vanden Bosch der Nederlanden, & Tichko, 2012).…”