Summary
The Cronbach Alpha coefficient.Unit
Statistics
Declaration
Function CronbachAlpha(Data: TMtx): TSample;
Description
Calculates the Cronbach Alpha coefficient, defined by the following relation:
where K defines number of items (Data columns) and sigma(i,j) estimated covariance between item i and j. Cronbach's alpha measures how well a set of items (or variables) measures a single unidimensional latent construct. When data have a multidimensional structure, Cronbach's alpha will usually be low. Technically speaking, Cronbach's alpha is not a statistical test - it is a coefficient of reliability (or consistency).
Categories
Multivariate analysis routines| Copyright 2008 Dew Research |