Exploratory factor analysis: Difference between revisions

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There are a number of procedures in order to determine the best number of factors, including scree plot, parallel analysis, kaiser criterion, and model comparison. The first three measures rely on eigenvalues. The ''eigenvalue'' of a factor represents the amount of variance of
the variables accounted for by that factor. The lower the eigenvalue, the less that factor contributes to the explanation of variances in the variables.<ref name =Norris/>)
 
===Scree plot===