The Dialect Differentiation Measure (DDM) provides an objective, quantifiable means of identifying speakers of Black English. Three production tasks, designed to constrain the range of linguistic constructions with which a child may respond, elicit seven phonological and syntactic features characteristic of Black English. The DDM was tried out in an effort to test its ability to differentiate between the speech of thirty Anglo and black kindergarten children. The instrument ranked black children on a continuum of nonstandard usage and successfully distinguished speakers of nonstandard Black English. Tables of findings are included. (Author/JM)