_____ is a statistical approach that identifies groups of items that are similar to each other.

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Factor analysis is a statistical approach that identifies groups of items that are similar to each other based on their underlying factors or characteristics. It helps to reduce a large number of variables into a smaller set of factors and is commonly used in fields such as psychology, marketing, and finance. Orthogonality refers to the statistical independence of variables, the act frequency approach is a method of language acquisition, and rational scale construction is a process of developing measurement scales. None of these are related to identifying similar groups of items through factor analysis.

_____ Is a Statistical Approach That Identifies Groups of Items