What are Lexiles and how are they used in SRI?
The Lexile Framework® for Reading is a scientific approach to reading comprehension and text measurement that matches a reader’s ability to a text’s difficulty, allowing individualized monitoring of progress. It includes the Lexile® measure and the Lexile scale. The Lexile measure is a reading ability or text difficulty score followed by an “L” (e.g., “850L”). SRI uses the developmental Lexile scale for texts ranging from 100L for beginning readers (BR) to above 1500L for advanced readers. Because SRI’s standard error of measure is ±50, any score below 100L is reported as “BR.” Any score above 1500L is reported as 1500+ due to the limited number of authentic texts available to provide items aligned to scores above 1500L. All Lexile Framework products, tools, and services rely on the Lexile measure and scale to match reader and text. Lexile measures are the most widely adopted reading measures in use today. Tens of thousands of books and tens of millions of newspaper and magazine
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