A method of providing diagnosis capability, diagnosis of the effects of treatment or diagnosis of distinctive capabilities of a test subject, the method can comprise the steps of: (a) carrying out a series of tests on a group of subjects of at least two modal measures, the modal measures comprising brain-body function, brain structure, neuropsychological, personality, genetics, personal history, performance and behaviour; and (b) examining the inter-relationships between the modal measures to output an analysis of the inter-relationships of two or more measures of the tests results of the group of subjects.