This study developed and evaluated the psychometric properties of the IRRIT-IJ, a 26-item self-report scale measuring trait-like and recent state-like irritability across tonic (persistent mood) and phasic (outburst) dimensions in 286 Brazilian adolescents and young adults aged 11–24 years.
The final 26-item scale (13 State, 13 Trait items) showed a two-dimensional tonic/phasic structure with high internal consistency for both subscales (State: α = 0.892, ω = 0.891; Trait: α = 0.891, ω = 0.890). IRRIT-IJ scores correlated positively with irritability, psychological distress, and minor mental disorder symptoms; females scored higher than males on both subscales.
- Convenience sample from Brazilian schools/universities limits generalizability. - Exploratory and confirmatory factor analyses were run on the same sample, so CFA results are preliminary, not cross-validated. - No test-retest reliability data and no measurement invariance testing across gender or age subgroups.
The IRRIT-IJ offers a complementary screening tool for clinicians to distinguish between recent-state and trait-like irritability, as well as tonic versus phasic expressions, in adolescents and young adults aged 11–24. It should be used alongside—not instead of—established measures like the ARI or BITe until further validation is available.
Explore related topics
