Methods, systems, and apparatus, including medium-encoded computer program products, for analyzing data include: receiving data including a person's responses regarding judgments of semantic similarities between items selected from a group of items falling into a same categorical level; processing the data to determine a measure of distance within a generated representation of the person's responses regarding the judgments of semantic similarities; and generating a score of degree of cognitive impairment for the person based at least in part on the determined measure of distance within the generated representation.
SYSTEMS AND METHODS FOR ASSESSING HUMAN COGNITION, INCLUDING A QUANTITATIVE APPROACH TO ASSESSING EXECUTIVE FUNCTION