Subscores: A Practical Guide to Their Production and Consumption.

The article discusses the importance of subscores in educational and psychological testing, particularly in response to demands for more detailed information about examinees' knowledge and skills. It highlights the challenges and limitations of subscores, such as their reliance on few items and high correlation with total scores. The article reviews a book that provides a comprehensive guide to producing and interpreting subscores, offering practical recommendations for testing practitioners. The book covers the history of subscores, methods of reporting them, evaluating their quality, and making decisions about their use based on psychometric standards. It also addresses the issue of subscore equating and provides a flowchart for decision-making on reporting subscores. [Extracted from the article]