Anger Assessment in Clinical and Nonclinical Populations: Further Validation of the State-Trait Anger Expression...

Area of Science:

• Psychological assessment
• Clinical psychology
• Psychometrics

Background:

• The State-Trait Anger Expression Inventory-2 (STAXI-2) is widely used for anger measurement.
• Validation and comparison across different populations are crucial for its application.

Purpose of the Study:

• To examine the validity and reliability of the STAXI-2.
• To compare anger expression and experience in clinical and nonclinical samples.

Main Methods:

• Investigated reliability, concurrent validity, and construct validity.
• Utilized Dutch undergraduate students (N=764), a general population sample (N=1211), and psychiatric outpatients (N=226).

Main Results:

• The STAXI-2 demonstrated strong reliability and validity.
• Patients exhibited higher anger experience and expression than the general population.
• Forensic outpatients with addiction reported higher Anger Expression-Out than general psychiatric outpatients.

Conclusions:

• The STAXI-2 is a suitable instrument for assessing anger experience and expression.
• Findings support its use in both general and clinical populations.