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Por otro lado, la consistencia interna puede ser evaluada por medio de cuatro métodos: 1) mitad dividida (5,7-9,13,14); 2) correlaciones totales totales (13); 3) coeficiente de Kuder-Richardson (13); y 4) coeficiente alfa ( α) (13). El coeficiente α fue propuesto por Cronbach en el año 1951, y es considerado como un estimador de ...
total de una escala de medida es el denominado alfa de Cronbach ( , Cronbach, 1951). Es decir, el alfa de Cronbach estima cómo de fiables son las respuestas dadas a un conjunto de ítems señalando el grado de consistencia de las respuestas (estabilidad) respecto al dominio psicológico medido.
Cronbach’s alpha can be written as a function of the number of test items and the average inter-correlation among the items. Below, for conceptual purposes, we show the formula for the Cronbach’s alpha: α = N c ¯ v ¯ + ( N − 1) c ¯. Here N is equal to the number of items, c ¯ is the average inter-item covariance among the items and v ...
Cronbach’s alpha (α) is an estimate of reliability, specifically the internal consistency, of a test or scale. It is widely used in psychological test construction and interpretation (Cortina, 1993).When internal consistency is present in a test, it is interpretable (Cronbach, 1951).Cronbach’s alpha seeks to measure how closely test items are related to one another and thus measuring the ...
1 de ene. de 2005 · En 1951, Cronbach propuso el. coeficiente α como un estimador de este índice de equivalencia, con el cual generalizó un. conjunto de diferentes métodos qu e se empleaban en la época para tal ...
Cronbach’ alpha values between 0.70 and 0.90 suggest a good internal consistency. The Cronbach’ alpha coefficient may be estimated when a three- to twenty-item one-dimensional scale is administered and particularly when it is difficult to conduct a validation study against a gold standard.
27 de jun. de 2011 · Alpha was developed by Lee Cronbach in 1951 11 to provide a measure of the internal consistency of a test or scale; it is expressed as a number between 0 and 1. Internal consistency describes the extent to which all the items in a test measure the same concept or construct and hence it is connected to the inter-relatedness of the items within ...
