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Principal Component Analysis: Factor Loadings of PAI Instrumental Aggression Items

Principal Component Analysis: Factor Loadings of PAI Instrumental Aggression Items

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The heterogeneity of violent behavior is often overlooked in risk assessment despite its importance in the management and treatment of psychiatric and forensic patients. In this study, items from the Personality Assessment Inventory (PAI) were first evaluated and rated by experts in terms of how well they assessed personality features associated wi...

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... to the PCA analysis on reactive aggression, items that did not load on any factor or loaded on more than one factor were excluded and the PCA was repeated until at least four items loaded onto each factor and simple structure was maintained. This resulted in 18 items (loadings $0.40), accounting for 46.3% of the total variance, and a three factor structure: 7 items loaded on a Lack of Empathy factor, 7 items loaded on a Manipulative Behavior factor, and 4 items loaded on a Shallow Affect factor (see Table 2 for loadings and PAI scale belongingness). Cronbach's alpha coefficients for the three factors were as follows: Lack of Empathy 5 .797, ...

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Citations

... A few new indicators have emerged in this area. Antonius et al. (2013) developed scales intended to measure reactive aggression, defined by impulsivity and hastiness, and instrumental aggression, defined by premeditation and manipulation. PAI items were rationally selected by expert judges on the basis that they fit reactive and/or instrumental aggression criteria over the course of two iterations of testing. ...
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Aggression, violence and deviant behavior are terms frequently used interchangeable, but relate to different theoretical concepts. Therefore, this chapter starts with a definition of aggression. Furthermore, several theories regarding the development of aggression will be presented. According to some theories, aggression is biologically or emotionally driven and innate, while other theories state that aggression is the result of a (social) learning process, susceptible to change. This chapter presents a discussion of various etiological models of aggression. As research indicates that a lack of self-control and impulsivity is a key risk factor for aggressive behavior, models regarding impulsivity and scientific studies of the relationship between impulsivity and aggression will be outlined. In relation to risk assessment within the forensic field, various risk factors relate to aggression and various abnormalities in neurobiology (the frontal lobe, autonomic reactivity, hormones and neurochemical functioning) seem to predispose individuals towards aggressive responses. This chapter therefore also gives an overview of these risk factors, with a special emphasize on the role of impulsivity. Finally, the chapter ends with a short overview of effective treatment programs for aggression.
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