1. A diagnostic tool for determining a cognitive state of a subject, the diagnostic tool comprising: a battery of tests for measuring a neurological parameter; an interface allowing a clinician to access said battery of tests and administer said battery of tests to a subject, said subject generating data in response to said administered battery of tests; a processor for processing said generated data; and a report generated by said processor and based on said generated data, wherein said report provides a view of said data within ranges and sub-ranges of cognitive ability.