What is the author's style in Strong Horse Tea by Alice Walker?

Walker uses language in this story to illustrate the futility of Rannie's requesting help from the mailman. Due to the mailman's view of Rannie as ignorant, Rannie's own use of language further confirms the mailman's belief and results in his not really listening to the pleas for help. He sees Rannie's pleas as her "gabbing away about 'Snooks' and 'NEWmonia' and 'shots' and how she wanted a 'REAL doctor.'" This is Walker's comment on the white man's view of the black woman's ignorance.