News & Updates
Search Research Content
Resource Finder at Kennedy Krieger Institute
A free resource that provides access to information and support for individuals and families living with developmental disabilities.
Prevalence of Reading Difficulties: 4th-8th Grade
The central goal of this project is to estimate the prevalence of various types of reading disability (RD) in the population of upper elementary and middle school students (grades 4 and 8). All data was previously collected in a two-stage probability sampling of public schools throughout the state of New Jersey which assessed reading and related skills. The de-identified data is received for analysis only. The schools in the sampling frame were stratified by enrollment size (large, medium, and small) and by the socioeconomic and ethnic composition of the community served by the school. Prevalence estimates will be derived for overall RD and separately for each subtype of RD that is identified in other Center projects as being distinct from other types in its occurrence and its patterns of association with cognitive-linguistic skills.
It is anticipated that these RD profiles of interest will include deficits, alone and in combination, in comprehending text, recognizing/decoding words, and reading fluency. We are also examining the relative prevalence of each RD subtype according to demographic factors (age/grade, gender, socioeconomic status, ethnicity) and other student characteristics, especially English language proficiency. Having collected data about family, community, school, and instructional contexts, we are able to investigate relationships between disadvantage/poverty and RD, and to identify potential risk and protective factors within these contexts. Determining the prevalence and distribution of reading difficulties across this age range and within subgroups of the population is of critical importance for designing reading instruction and school services that can best address the needs of struggling readers beyond the primary grades.