n. a dimension of personality in Eysenck’s dimensions characterized by aggression, impulsivity, aloofness, and antisocial behavior, indicating a susceptibility to psychosis and psychopathic disorders (see antisocial personality disorder). It was originally developed as a factor for distinguishing between normal individuals and those with schizophrenia or bipolar disorders, using tests of judgment of spatial distance, reading speed, level of proficiency in mirror drawing, and adding rows of numbers.