“…When adults walk, row, tap, dance, or sing in synchrony with one another, affiliative behaviors such as trust, cooperation, and ratings of likeability are encouraged (Anshel & Kipper, 1988;Hove & Risen, 2009;Reddish, Fischer, & Bulbulia, 2013;Tarr, Launay, Cohen, & Dunbar, 2015;Valdesolo, Ouyang, & DesSteno, 2010;Weinstein, Launay, Pearce, Dunbar, & Stewart, 2015;Wiltermuth & Heath, 2009). Even 4-year-old children who play together in a musical versus a nonmusical way are later more helpful and cooperative with one another (Kirschner & Tomasello, 2010).…”