Effects of Positive Impression Management on the Psychopathic Personality Inventory

The Psychopathic Personality Inventory (PPI; S. O.Lilienfeld & B. P. Andrews, 1996) is a self-report test that has shown considerable promise as a screening measure for psychopathy. A current limitation of the PPI is that no data exist regarding the impact of response sets such as positive impression management. Although the PPI contains a validity scale (Unlikely Virtues) designed to identify response biases such as faking good, its utility has not yet been assessed. In this study a repeated measures analogue design was employed in which 186 respondents completed the PPI both under standard conditions and with specific instructions to create a favorable impression of themselves. In the fake good condition, participants were able to appear significantly less psychopathic, with those who obtained higher scores in the standard instruction condition showing the largest decreases in their PPI scores. Receiver Operating Characteristic analyses indicated that, although the Unlikely Virtues scale significantly differentiated between fake good and honest protocols (area under the curve = .73), a considerable number of misclassifications occurred. The clinical and forensic implications of these findings are discussed.     

Anxiety and cynicism: Companions of the police officer

The work of enforcing the law has inherently aerated anxiety and cynicism among police officers. Through the use of Neiderhoffer’s Police Cynicism Scale and the State-Trait Anxiety Inventory, the levels of anxiety and cynicism were measured in a random sample of peace officers from the Attanta area. The authors found, through the use of a single-factor analysis of variance, that when anxiety decreased, cynicism decreased. One conclusion, contrary to earlier studies, was that cynicism is higher among new police officers than among veteran officers.