Yoruba dancers and drummers, for instance, express communal desires, values, and collective creativity. The drumming represents an underlying linguistic text that guides the dancing performance, allowing linguistic meaning to be expressed non-verbally. The spontaneity of these performances should not be confused with an improvisation that emphasizes the individual ego. The drummer's primary duty is to preserve the community. Master dancers and drummers are particular about the learning of the dance exactly as taught. Children must learn the dance exactly as taught without variation. Improvisation or a new variation comes only after mastering the dance, performing, and receiving the appreciation of spectators and the sanction of village elders.