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Validation of the Impulsive/Premeditated Aggression Scale in Mexican psychiatric patients
Laura Romans1, Ana Fresán, Héctor Sentíes
1Laura Romans, Servicios de Atención Psiquiátrica. Secretaría de Salud . Mexico City , Mexico.
Introduction:
Aggression has been linked to several psychiatric disorders. None of the available instruments validated in Mexico is able to classify aggression as impulsive or premeditated. The Impulsive/Premeditated Aggression Scale (IPAS) is a self-report instrument designed to characterize aggressiveness as predominately impulsive or premeditated.
Objective:
The aim of the study was to determine the validity and reliability of the IPAS in a sample of Mexican psychiatric patients.
Method:
A total of 163 patients diagnosed with affective, anxiety or psychotic disorder were included. A principal-component factor analysis was performed to obtain construct validity of the IPAS impulsive and premeditated aggression subscales; convergent validity as well as internal consistency of subscales were also determined.
Results:
The rotated matrix accounted for 33.4% of the variance. Significant values were obtained for convergent validity and reliability of the IPAS subscales.
Conclusion:
The IPAS is an adequate instrument, which might be used to differentiate the type of aggressive behavior in Mexican psychiatric patients.
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