出版社：Centro Interamericano de Investigaciones Psicológicas y Ciencias Afines
摘要：Se presenta un programa en formato MS Excel para calcular el índice Dm para la validez de los ítemes. La validez es un proceso de acu- mulación de pruebas para apoyar la interpretación y el uso de las puntuaciones de los tests psicoló- gicos, siendo las relaciones de los puntajes con otras variables externas una importante fuente de validación. Una variante es la llamada validez relacionada al criterio, en la cual se espera una correlación significativa con aquellos criterios externos que son teóricamente relevantes. Para ello se consideró el índice Dm. En tal sentido, el uso adecuado de estos métodos y su falta de im- plementación en los paquetes estadísticos tradi- cionales justifica su construcción como una he- rramienta adecuada para el investigador en Psicología y específicamente en Psicometría, dis- ciplina en la cual es común el uso de correlacio- nes como un indicador absoluto de validez, sin considerar otros aspectos conceptuales. Se discute el uso y las limitaciones de la herramienta.
其他摘要：The aim of this paper was to propose a program in MS Excel for quick calculation of Dm index, which could be used in psychometrics to evaluate the item validity of psychological instruments. Validity is a process of accumulating evidence to support the interpretation and use of psychological test scores, with scores relations with other external variables an important source of validation. A variant is called criterion-related validity, which seeks to demonstrate the accuracy of the hypoth- esized relationships between measurements made with other measurements, using correlations or other measures that indicate some kind of relation- ship. This was considered the Index Dm, which is expected to be significantly correlated with those external criteria that are theoretically relevant, so achieving specify prior, as a hypothesis, what direction it will take and what the correlation coefficient is expected. Dm index indicates a measure of the absolute deviation of the observed correlations regarding hypothesized values. In this index, we then consider the number of external criteria, the correlation coefficient between the item and the external criterion, the squared distance between the coefficient of correlation and .50 by the sign of the correlation coefficient between the item and the criterion external. In social sciences rarely expect a correlation greater than .50, al- though this constant researcher can vary depending on the background you have about the test to investigate and the relationship you have with other constructs. The range of this indicator ranges from 0 to 1, with the result 1 when there is perfect and criterion validity is obtained when each observed...
关键词：Psicometría; Validez de los íte- mes; Correlaciones; Índice Dm;Psicometría; Validez de los íte-mes; Correlaciones; Índice Dm
