what is the purpose of the first component score why do we only use the first component score in calculating pca scores? why do we use only the first component score why do we use only the first component scores to construct different indices why does the first component score need to be used for different measures why do we use only the first component scores to construct different indices? why use first component scores why is a first component score a first component score what scores are used in pca scores why use one score on an entire score why do we use only first score why is pca composite score used why we use the first score? why do we use only the first component scores why do we use only the first component scores why do we use only the first component scores to construct different indices? why use only the first component scores in a score why do we use the first component score what is pca scoring why do we use only the first component score to construct different indices