Why Should You Perform Bivariate and Multivariate Analyses of the Items

Multiple Choice

Why should you perform bivariate and multivariate analyses of the items in your index?

A) to make them longer
B) to help you develop new items
C) to see how they correspond to each other to decide which ones should be included
D) to see how they differ from each other to make sure you include different items
E) your results would be invalid otherwise