You know what I mean? Agreement marking in British black English

Evidence is produced to show that in London Jamaican, a type of Jamaican Creole, Bradford Jamaican, another variety of Jamaican Creole, and the London English of Caribbean adolescents, the tags you know what I mean and you know are used to perform rather than to elicit agreements, as they do in better-studied varieties of English. The evidence rests on conversational data collected by the authors in different parts of London and in Bradford, in the course of two separate research projects. It is argued that the sequential placement of you know what I mean and you know , and the responses to them by other participants in the conversation, require them to be treated as instances of agreement marking.