Journal of Psychology & Psychotherapy
Open Access

Validation of the translated portuguese version of impulsive premeditated aggression scale

Joint Event on 24^th International Conference on psychiatry & psychosomatic medicine & 2^nd International Congress on forensic science and psychology

October 12-14, 2017 London, UK

Jacinto NC Azevedo, Margarida Figueiredo-Braga and Jose L Pais Ribeiro

Faculdade de Medicina da Universidade do Porto, Portugal
FPSEUP- University of Porto, Portugal

Posters & Accepted Abstracts: J Psychol Psychother

Abstract :

Aggression is one of the core symptoms of antisocial personality disorder (ASPD) with therapeutic and prognostic relevance. ASPD is highly prevalent among inmates, with enormous impact on the criminal justice system. Among the symptoms of ASPD, behavior patterns marked by elevated levels of aggression and impulsivity require the distinction between different forms of aggression. The Impulsive/Premeditated Aggression Scale (IPAS) is a self-report instrument that characterizes aggressiveness as predominately impulsive or premeditated. This study aims to determine the validity and reliability of the IPAS in an inmate Portuguese sample. A total of 195 inmates were included in the study. A principal-component factor analysis was performed to obtain construct validity of the IPAS impulsive and premeditated aggression subscales; convergent validity and internal consistency of the subscales were also determined. The rotated matrix accounted for 33.4% of the variance. Acceptable values were obtained for convergent validity (Cronbach alpha impulsive subscale: 0.89; Cronbach alpha premeditated subscale: 0.083) and reliability of the IPAS subscales (test re-test correlation: Impulsive subscale 0.88, premeditated subscale: 0.69). In our sample, the patients with ASPD had the same distribution of categories of aggression, then those without ASPD.