Speech/Language Impairment or Specific Learning Disability? Examining the Usage of Educational Categories

Developmental language disorder (DLD) is a lifelong condition that when impacting educational performance is identified and serviced through U.S. schools as outlined in the Individuals with Disabilities Education Act. A few examples of educational categories that refer to DLD are (a) speech or language impairment (S/LI) and (b) specific learning disability (SLD). In this research note, we aim to examine trends in how these categories are assigned.

We analyzed publicly available data released by the U.S. Department of Education from six school years between 2010 and 2020. We examined the use of S/LI and SLD categories across students of different ages at the U.S. national and state levels.

We present a trend in which younger students tend to be identified with the S/LI category, whereas older students tend to be identified with the SLD category. This trend is evident in all 6 years of data analyzed at the national level, and in 49 of 50 states.

We discuss these findings in the context of research on language disorders to explain this trend. We highlight the potential damaging effects of using inconsistent terminology, including affecting the services for which students with DLD qualify and causing confusion for their parents and educators.