Are there grade-level equivalents associated with the Lexile scores reported by SRI?
The Lexile scale is a criterion-referenced, continuous scale. Therefore, grade equivalents are less relevant to it than to other strictly norm-referenced scales. If you review the poster SRI and the Lexile Framework included with the SRI software, you will notice that the Lexile values associated with the materials for a given grade comprise a range, and the range spans more than one grade. In other words, when it comes to text-based measures, there is no single value that can be said to characterize all the written materials in a given grade. Similarly, if you review the normative results from SRI, you will see that ability within a grade spans a range of Lexile values. The closest approximation of a given reader-based Lexile measure to a grade equivalent is the median Lexile score for that grade; that is, the Lexile score equivalent to the 50th percentile for the grade. For example, the Lexile score equivalent to the 50th percentile in spring of Grade 4 is 700L; therefore, fourth gra
