The State-Trait Anxiety Inventory A-Trait Scale: dimensions and their generalization.

Area of Science:

• Psychometrics
• Psychology
• Anxiety Research

Background:

• The State-Trait Anxiety Inventory (STAI) is a widely used measure of anxiety.
• Understanding the psychometric properties of the STAI across different demographic groups is crucial for accurate assessment.
• Previous research has explored the factor structure of the STAI, but cross-sex comparisons require careful consideration.

Purpose of the Study:

• To investigate the factor structure of the State-Trait Anxiety Inventory A-Trait scale.
• To determine if the factor patterns are comparable between male and female student samples.
• To inform best practices for psychometric investigations involving the STAI.

Main Methods:

• Administered the State-Trait Anxiety Inventory A-Trait scale to 152 female and 158 male students.
• Conducted principal-components factor analyses separately for each sex.
• Compared the resulting orthogonal factor patterns between the male and female groups.

Main Results:

• Principal-components factor analysis identified four orthogonal factors for both male and female student groups.
• Factor patterns differed between the sexes, suggesting distinct underlying structures.
• Limited support was found for the generalization of anxiety dimensions across sex and diverse samples.

Conclusions:

• Factor pattern comparisons are essential before pooling data across sexes in psychometric studies of the STAI.
• The generalization of anxiety dimensions measured by the STAI across sex and cultures may be limited.
• Researchers should exercise caution when interpreting STAI results without considering sex-specific factor structures.