Cognitive function index

A computer-readable medium encoding a computer program product operable to cause data processing apparatus to perform operations comprising:

• receiving first information concerning a person, the first information specifying the person's responses, and lack thereof, for components of a cognitive test administered to the person;
• generating a cognitive function score for the person by comparing the first information with second information concerning a group of people to whom the cognitive test has been administered;
• converting the cognitive function score to a value in an index comprising a range of values, wherein a first portion of the range corresponds to a cognitively impaired zone, a second portion of the range corresponds to a cognitively normal zone, and a third portion of the range corresponds to a zone of uncertainty defined by a confidence interval centered on a mid-point of the index;
• and
• providing the indexed value for the person.

A system comprising:

• a user interface device;
• and
• one or more computers operable to interact with the user interface device and to perform operations comprising:
• receiving first information concerning a person, the first information specifying the person's responses, and lack thereof, for components of a cognitive test administered to the person;
• generating a cognitive function score for the person by comparing the first information with second information concerning a group of people to whom the cognitive test has been administered;
• converting the cognitive function score to a value in an index comprising a range of values, wherein a first portion of the range corresponds to a cognitively impaired zone, a second portion of the range corresponds to a cognitively normal zone, and a third portion of the range corresponds to a zone of uncertainty defined by a confidence interval centered on a mid-point of the index;
• and
• providing the indexed value for the person.