Despite a marked expansion in the methods and applications of cognitive therapy, few specific models exist that delineate the process and means of psychotherapeutic change within cognitive therapy. In the present model, three core conceptual components of change are suggested: interpersonal conscious appraisal, response procedures and therapeutic communication. The subsequent circumplex developed from the core components enables the classification and description of 16 identifiable assessment profiles. Specific hypotheses drawn from the cognitive circumplex are stated concerning levels of functioning, client/problem complexity and typical client interactions. The circumplex is offered as a means of assessing, tracking and evaluating change during cognitive therapy. The structure of the model is consistent with the goals, rationale and expectations of cognitive therapy.