ADAPTACION DE UNA ESCALA DE DISTORSIONES COGNITIVAS SOBRE LOS JUEGOS DE AZAR EN UNA MUESTRA NACIONAL DE ESTUDIANTES COLOMBIANOS

<p>Los objetivos de este trabajo fueron a) adaptar el Inventario de Pensamientos sobre el Juego (IPJ, Echeburúa, Fernández-Montalvo y Báez, 1997) a una muestra no aleatoria de estudiantes colombianos (n=4300) de todas las regiones del país, b) estudiar la prevalencia de las distorsiones cognitivas sobre los juegos de azar y c) analizar los puntajes en el instrumento de acuerdo al género, el nivel socioeconómico y la edad. En los resultados, la escala mostró una buena fiabilidad interna y una estructura unidimensional. Alrededor del 50% de los sujetos presentaban de 2 a7 distorsiones cognitivas, y los puntajes más altos en el IPJ se dieron en los hombres, las personas de clases sociales bajas, en las más jóvenes y en quienes pensaban que si les tocaría mucha plata se resolverían todos sus problemas.</p>

[Factor structure and internal consistency of the Spanish version of the Parenting Stress Index-Short Form]

The aim of this study was to analyze the psychometric properties of the Spanish version of Parenting Stress Index-Short Form. After translating the instrument from English into Spanish using the forward-backward translation method, it was administered to a sample of 129 mothers of children aged between 10 and 39 months olds. The exploratory factor analysis identified two factors: Childrearing Stress and Personal Distress, which accounted for 48.77% of the variance. The internal consistency of these factors was high (Childrearing Stress: .90 and Personal Distress: .87). Implications of these findings and suggestions for future research are discussed.

Fitting Rasch model using appropriateness measure statistics

In this paper, the distributional properties and power rates of the Lz, Eci2z, and Eci4z statistics when they are used as item fit statistics were explored. The results were compared to t-transformation of Outfit and Infit mean square. Four sample sizes were selected: 100, 250, 500, and 1000 examinees. The abilities were uniform and normal with mean 0 and standard deviation 1, and uniform and normal with mean -1 and standard deviation 1. The pseudo-guessing parameter was fixed at .25. Two ranges of difficulty parameters were selected: +/- 1 logits and +/- 2 logits. Two test lengths were selected: 15 and 30 items. The results showed important differences between the T-infit, T-outfit, Lz, Eci2z, and Eci4z statistics. The T-oufit, T-infit, and Lz statistics showed poor standardization with estimated parameters because their distributional properties were not close to the expected values. However, the Eci2z and Eci4z statistics showed satisfactory standardization on all conditions. Further, the power rates of Eci2z and Eci4z were 5% to 10% higher than the power rates of Lz, T-outfit, and T-infit to detect items that do not fit Rasch model.