Abstract: The purpose of this study was to investigate the definition of matching perceptual predicates by comparing subjects' responses to three counselor responses: matching perceptual predicates, mismatching perceptual predicates, and Milton-model matching. Matching perceptual predicates was defined as the counselor using process which indicated the same sensory code used by the client. Mismatching perceptual predicates refers to the counselor responding to the client with words indicating a different sensory code than the client. Milton-model matching was defined as the counselor responding to the client's use of perceptual predicates with nonspecific predicates. Two presumptions of the Neurolinguistic Programming (NLP) model were supported by the results that the subjects responded to matching perceptual predicates, mismatching perceptual predicates, and MIlton-model matching as separate counselor responses within the two dimensional space. One presumption was that subjects can discriminate between counselor responses that indicate same versus different sensory codes. The other presumption was that subjects can discriminate between counselor responses that indicate nonspecific versus perceptual predicates.