A statistical tool that identifies clusters of related test items that seem to tap a common ability is called

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Factor analysis is a statistical tool used to identify clusters of related test items that seem to tap a common ability or trait, such as verbal reasoning or spatial awareness. This can help researchers better understand the underlying construct being measured and improve the overall reliability and validity of the test. Standardization, validation, and reliability assessment are important aspects of test development and evaluation, but they do not specifically address the identification of item clusters or factors.

A Statistical Tool That Identifies Clusters of Related Test Items