The evidence for speech therapy

The evidence, policy materials, and attributed reporting referenced on this page are listed below. Read the complete Sources & methodology library.

• Speech and language therapy interventions for children with primary speech and language delay or disorder — Campbell Systematic Reviews, 2005
• A meta-analysis on the effectiveness of intervention in children with primary speech and language delays/disorders — Clinical Psychology & Psychotherapy, 2021
• Developmental language disorder — National Institute on Deafness and Other Communication Disorders
• Education and employment outcomes of young adults with a history of developmental language disorder — International Journal of Language & Communication Disorders, 2018
• Young adults with developmental language disorder: a systematic review of education, employment, and independent living outcomes — Journal of Speech, Language, and Hearing Research, 2020
• Community-based early intervention services to promote school readiness: longitudinal follow-up of program costs and benefits — The American Journal of the Medical Sciences, 2025
• Effectiveness, costing and cost effectiveness of interventions for children and young people with speech, language and communication needs — U.K. Department for Education, 2012
• UK economy would benefit by £8 billion from earlier investment in children's speech and language support — Speech and Language UK