Novaco Anger Scale: reliability and validity within an adult criminal sample

Area of Science:

• Psychology
• Criminology
• Forensic Psychology

Background:

• The Novaco Anger Scale (NAS) is a widely used measure for assessing anger.
• Its psychometric properties require validation within specific populations, such as correctional offenders.
• Understanding anger expression is crucial for offender rehabilitation and risk assessment.

Purpose of the Study:

• To evaluate the test-retest reliability and concurrent validity of the Novaco Anger Scale (NAS).
• To compare NAS scores between general and violent offender groups within correctional facilities.
• To assess the scale's utility for clinical applications in offender populations.

Main Methods:

• The study involved 204 male offenders (General Admissions and Violent Admissions) aged 18-69.
• One-month test-retest reliability was assessed using paper-pencil and computerized formats.
• Concurrent validity was examined by correlating NAS scores with other anger/aggression measures and clinical ratings.

Main Results:

• High test-retest reliability (r = .78–.91) was found for the General Admissions group.
• Violent Admissions group scored significantly lower on the NAS compared to General Admissions.
• The NAS showed stronger correlations with anger measures than with negative affect indices, supporting its validity.

Conclusions:

• The Novaco Anger Scale (NAS) is a reliable and valid instrument for use with correctional offenders.
• The findings suggest potential differences in anger expression between general and violent offender groups.
• The NAS has implications for clinical assessment and intervention strategies within forensic settings.