Help organize the relationships that emerge from large arrays of data in a coherent fashion the 

University of Michigan - Ann Arbor

When variables change together, they must have some element in common that underlies their relationship

Idea Underneath the Factor Analysis

Trull , T. J., &amp; Prinstein , M. J. (2013). Research Methods in Clinical Psychology . In Clinical Psychology (Eighth, pp. 93–124). Textbook, Wadsworth Cengage Learning . 

Clinical Psychology Eighth Edition 

Advantage of Factory Anlysis

What emerges from a factor analysis is determined by the nature of the measures included in the first place

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