Aggression and hostility are assessed by a number of different techniques. Ratings by psychologists, psychiatrists, and relatives tend to be unrelated but on factor analysis all show an Aggressiveness and a Hostility factor. The level of emitting hostile verbs and solutions to scrambled sentences may be better than all other measures. The Iowa Picture Interpretation Test is related to these measures. Rorschach hostility is not. Ratings of psychiatrists and female relatives are related to the Buss-Durkee Inventory. (PsycINFO Database Record (c) 2006 APA, all rights reserved)