The way groups of Black and white people talk is the topic of Tom Kochman's book, "Black and White Styles in Conflict". White people, says Kochman, will have a discussion about items of disagreement. Black people will be more confrontational with the disagreement. Kochman also talks about white people practicing self control of repression. Mahalia Jackson is brought up as an example of when she sings, she demonstrates her words with her body movements.