Psychometrics: Measuring Unseen Client Characteristics Psychometrics is the science and practice associated with the measurement of human characteristics. These are often referred to as “unseen” individual characteristics, including cognitive ability, personality, and knowledge. Typically, psychometricians are borne out of applied psychological and educational fields. Psychometrics has been used for over a century in a variety of fields for decision-making, counseling and coaching, and self-assessment, including, but not limited to: Clinical psychology and psychiatry Educational …