what is principal component analysis used for what does principal component analysis in r how does a principal component analysis work in r what is the principal component of a cognitive test? how to use principal component analysis in r what is principal component analysis which principal component should be used in r? what is principal component for r how to find the principal component of cognitive test scores what is the principal component of intelligence? what is the principal component of a r r regression analysis r principal component analysis which is a variable based on weighted standardised cognitive test scores? what is the purpose of principal component analysis what is the principal component in r what is g in r is g variable a principal component can a principal component analysis be used to describe the variance of a cognitive test? why do a principal component analysis which of the following measures is a function of principal component analysis?