Evidencias de validez y fiabilidad de las puntuaciones del STAXI-2 para población general y hospitalaria: Estudio con una muestra de adultos de república Dominicana

To measure the experience, expression and control of anger, Spielberger built the Inventory State-Trait Anger Expression Inventory. This paper under took to evaluate the validity and reliability of the scores of the Spanish version of the STAXI-2 for the general and hospital population of the DR. To this end, the factorial structure was analyzed, the internal consistency of the instrument was evaluated, and evidence of validity was obtained by contrasting groups (general vs. hospital population). To conduct the study, we worked with a sample of 1034 participants from both the general population (N = 792) and hospital population (N = 242) from the city of Santiago de los Caballeros, Dominican Republic. The confirmatory factor analysis allowed to verify the adjustment of the original models for all anger scales (i.e. three-factor model for the anger-state scale, two-factor model for the anger-trait scale, and four-factor model for the scale of control and expression of anger). All the dimensions reached acceptable or optimal reliability indexes. Finally, the scales adequately discriminated between the general and hospital population, especially when the psychiatric sample was considered. Overall, the results allow us to conclude that the scores of the Spanish version of the STAXI-2 are valid and reliable to measure the state trait, and control-expression of anger in the DR.