Problem statement: The topic of motivation in therapy has received considerable attention; little of this attention, however, has yielded relevant and concrete information as to how should therapists motivate their clients in order to help them achieve their goals. Research questions: How does the therapist, through his verbal behavior, try to improve the odds of the client's doing their appointed tasks or homework? Purpose of the study: As part of an ongoing research program in verbal interaction in therapy, our aim is to adequately describe, in technical and operating terms, what is the therapist really doing when he/she intends to motivate the client for a given course of action. Research method: using the SISC-INTER-CVT in-session verbal behavior coding system, 88 sessions were studied and their motivational utterances classified according to their structure and their inferred function as elements in a behavior sequence. As a result of this process, a motivational utterances coding system (SISC-MOT) was developed, and all frequencies and proportions of the different types of motivational utterances were analyzed. Findings: The therapist does not issue motivational utterances in a random fashion; rather, he/she adapts their form and function to the clinically relevant activities that predominate in a given session.Conclusion: Motivational utterances as defined in this study can be a powerful resource in the clinician's endeavor to help the client achieve his/her goals if used properly. Helping the client anticipate the positive consequences of changing his/her behavior is of paramount importance, but doing it in the right moment and form is what really makes a difference.