As such, horizontal collectivism is manifested as an orientation in which group harmony is highly valued and in-group members are perceived to experience equal standing.
Doo-wop is a genre of rhythm and blues music that originated among African-American youth in the 1940s, mainly in the large cities of the United States, including New York, Philadelphia, Chicago, Baltimore, Newark, Detroit, and Washington, DC. It features vocal group harmony that carries an engaging melodic line to a simple beat with little or no instrumentation.
Thus they developed a form of group harmony based in the harmonies and emotive phrasing of black spirituals and gospel music.
Collectivist cultures view shyness as a more positive trait related to compliance with group ideals and self-control, while perceiving chosen isolation (introverted behavior) negatively as a threat to group harmony;