The Draw-A-Person Intellectual Ability Test for Children, Adolescents, and Adults (DAP:IQ) provides a common set of scoring criteria to estimate intellectual ability from a human figure drawing. Until now, measurement of cognitive ability by scoring drawings of human figures focused mainly on children and adolescents. The DAP:IQ applies this form of evaluation to adults as well, allowing for a more direct, continuous measurement of a common construct across the age range. The DAP:IQ improves the practice of evaluating human figure drawings (HFDs) as a measurement of cognitive ability by scoring elements representative of universal features of the human figure. The collection of a HFD is easily standardized with a set of simple, easily understood instructions, and requires a very short period of time.