Consistencia interna y validez factorial de la versión en español de la escala revisada de restricción alimentaria / Internal consistency and factorial validity of a spanish version of the revised restraint scale

The revised restraint scale (RS) it's a psychometric instrument for measuring chronic alimentary restraint. Aim: To obtain reliability measures and factorial structure of a Spanish RS version. Subjects and methods: 640 female undergraduate students completed the instrument. An exploratory factorial analysis (Le. principal components, with an oblique rotation-oblimin-) was performed over the RS scores. Results: Both RS sub-scales shown appropriate reliability levels, while KMO (0,89) and Barret (x²=1762,22; p< 0,01) test were acceptable. After exploratory factorial analysis two correlated factors (diet concern and weight fluctuations) emerged, explaining 51,25 percent of the variance. Conclusions: The Spanish RS version has a factorial structure congruent with the original self-report.

La escala revisada de restricción alimentaria (ERA) es un instrumento psicométrico que pretende medir la restricción alimentaria crónica. Objetivo: obtener indicadores de Habilidad y la estructura factorial de una versión en español del ERA. Sujeto y Método: 640 mujeres estudiantes universitarias respondieron el instrumento. Sobre los puntajes obtenidos se obtuvieron medidas de Habilidad y se realizó un análisis factorial exploratorio, particularmente un análisis de componentes principales con una rotación oblicua (oblimin directa). Resultados: Las subescalas de la ERA muestran niveles adecuados de Habilidad y se obtuvieron valores satisfactorios en la pruebas de KMO (0,89) y de esfericidad de Barret (x²=1762,22; p< 0,01). El análisis factorial exploratorio arrojó un factor de preocupación por la dieta y un factor de fluctuaciones de peso, que en conjunto explican el 51,25 por ciento de la varianza. Conclusión: La estructura factorial de la versión en español de la ERA es congruente con la original.

Restricción alimentaria y sobrealimentación: un modelo de la neurociencia afectiva: [revisión] / Overeating and restrained eaters: an affective neuroscience perspective: [review]

Some subjects may overeat when they experience anxiety even if they chronically restrict their food consumption. This contradictory behavior is a dysfunctional emotional regulation mechanism, which promotes the development of obesity and eating disorders. We review studies from a research program where alimentary restriction and overeating are conceived under the perspective of affective neuroscience. In this framework, restrained eaters (RE) are descríbed as subjects that are emotionally vulnerable and have dysfunctional emotional modulation strategies. We discuss empine evidence about the influence of motivational systems on alimentary behavior. Electrophysiological observations in RE reveal a self-referential processing of food stimulus as well as dysfunctional processing duríng the differentiation of emotional expressions. We stress the role of emotional education and the creation of psychometríc instruments designed for early detection of restrained eaters.