PREP- R is an instrument devised to assess the pragmatic efficacy of speakers with linguistic impairment during spontaneous conversation with the purpose of identifying, in a time efficient manner, whether the nature of their impairment is predominantly grammatical (what we call a grammar-based pragmatic deficit) or related to more general cognitive and communicative skills (that is to say, a specific pragmatic deficit). Drawing on a Functional Clinical Linguistics theoretical framework, it examines a range of 18 pragmatic skills across three levels, each of them focusing on a series of categories related to one of the main dimensions of the communicative process (i.e. the enunciative, the textual, and the interactive levels). This book has been devised to ease the experience of speech language therapists without previous knowledge about Pragmatics and willing to work with PREP-R as much as possible. Examples from a variety of clinical corpora are provided in order to illustrate each one of the skills assessed, along with a clear but thorough description of the theoretical knowledge needed in order to carry out a sound pragmatic assessment