Abstract
The Lifestyle Criminal Screening Form (LCSF) total score and the Psychological Inventory of Criminal Thinking Styles (PICTS) Reactive (R) scale both predicted subsequent aggressive disciplinary infractions in a group of 103 maximum security prison inmates but only the R scale successfully predicted total and nonaggressive disciplinary infractions in this group. Testing the incremental validity of these two measures it was determined that the LCSF failed to contribute significant unique variance to the prediction of disciplinary outcome when prior disciplinary record, age, and education were entered before the LCSF in a logistic regression analysis, but that the R scale successfully predicted total and aggressive disciplinary reports when entered into a logistic regression equation behind the LCSF, prior disciplinary record, and demographics (age, education).