This paper demonstrates a system for studying a clinical domain by means of a form of factor analysis which has been based on the use of the G index agreement. Using empirical data, the method was applied to the test responses of a group of normal and latent schizophrenic persons. Three factors were obtained - one factor representing normal persons and the other two representing latent schizophrenics. A validation was carried out, using a second sample of normal and latent schizophrenic persons. In addition, responses of schizophrenic and neurotic persons, from a second sample, were compared with the responses of the persons in the first sample.