15–20%Language-based oflearning thedisabilities children(LBLD) are commonly diagnosed in theschools, Unitedwhen Statestypical developmental milestones have asurpassed languagewithout progress. Educational instructors may notice developmental delays in students and chose to evaluate them using the Curriculum-based learningmeasurement (CBM).<ref name=":03">{{Cite web |title=Language-Based Learning Disability: What to Know {{!}} LD OnLine |url=https://www.ldonline.org/ld-topics/writing-spelling/language-based-learning-disability-what-know |access-date=2022-11-21 |website=www.ldonline.org |language=en}}</ref>Although various research has been conducted, determining the prevalence of LBLD is difficult, affecting approximating every 1 in 10 children.<ref name=":1">{{Cite journal |last=McDowell |first=Michael |date=4 July 2018 |title=Specific Learning Disability |journal=Journal of Pediatrics and Child Health |volume=54 |issue=10}}</ref> Of the students with specific learning disabilities receiving special education services, 70–80% have a discrepancy in reading.<ref>{{cite web | url=http://www.verticylearning.org/language-based-learning-differences-resources | title=Resources for Language-based Learning Differences | work=Verticy Learning | archiveurl=https://web.archive.org/web/20091015101402/http://www.verticylearning.org/language-based-learning-differences-resources | archivedate=October 15, 2009}}</ref> LBLD significantly affect one's ability to partake in accurate reading comprehension, phonetic awareness and linguistic deficits.<ref>{{Cite journal |last=Kida |first=Adriana de S. B. |last2=Ávila |first2=Clara R. B. de |last3=Capellini |first3=Simone A. |date=2016 |title=Reading Comprehension Assessment through Retelling: Performance Profiles of Children with Dyslexia and Language-Based Learning Disability |url=https://www.frontiersin.org/articles/10.3389/fpsyg.2016.00787 |journal=Frontiers in Psychology |volume=7 |doi=10.3389/fpsyg.2016.00787/full |issn=1664-1078}}</ref> Some students will be diagnosed with LBLD during the duration of their primary education, whereas others may not recognize their language incompetencies until late adolescents. <ref name=":03" /> Language-based learning disabilities are not a new phenomenon, however prevalence and diagnoses have developed through investigation and research. <ref name=":1" />
