Validation of the Portuguese Version of Impulsive-Premeditated Aggression Scale in an Inmate Population

Frontiers in Psychiatry
Jacinto Costa AzevedoMargarida Figueiredo-Braga

Abstract

Aggression is one of the core symptoms of antisocial personality disorder (ASPD) with therapeutic and prognostic relevance. ASPD is highly prevalent among inmates, being responsible for adverse events and elevated direct and indirect economic costs for the criminal justice system. The Impulsive/Premeditated Aggression Scale (IPAS) is a self-report instrument that characterizes aggression as either predominately impulsive or premeditated. This study aims to determine the validity and reliability of the IPAS in a sample of Portuguese inmates. A total of 240 inmates were included in the study. A principal component factor analysis was performed so as to obtain the construct validity of the IPAS impulsive aggression (IA) and premeditated aggression (PM) subscales; internal consistency was determined by Cronbach's alpha coefficient; convergent and divergent validity of the subscales were determined analyzing correlations with the Barratt Impulsiveness scale, 11th version (BIS-11), and the Psychopathic Checklist Revised (PCL-R). The rotated matrix with two factors accounted for 49.9% of total variance. IA subscale had 11 items and PM subscale had 10 items. The IA and PM subscales had a good Cronbach's alpha values of 0.89 and 0.88, r...Continue Reading

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Citations

Mar 7, 2020·PloS One·Jacinto AzevedoMargarida Figueiredo-Braga
Mar 8, 2019·Trends in psychiatry and psychotherapy·Ana Rita CruzFernando Barbosa

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Software Mentioned

IPAS
APA
NCME
SPSS
AERA

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