The CAPPCI is based on analysis of natural discourse using the methodology of Conversational Analysis (CA). This method drives both the content of the interview and the analysis of the conversational sample. Focusing on the interaction between the person with cognitive impairment and his/her conversational partner, and the ways in which the interaction is managed between them, the assessment procedure is designed to drive individually targeted intervention and measure changes in interaction over time. The motivating principle of the CAPPCI is recognition of the need for therapists to work in collaboration with people with cognitive impairments and their key conversational partners.