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Speech and Communication Disorders
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Symptoms

Speech and Communication Disorders

Speech and communication disorders affect a wide range of abilities, from sound production to language comprehension, and can often be addressed through professional therapy.

Overview

Many disorders can affect our ability to speak and communicate. They range from saying sounds incorrectly to being completely unable to speak or understand speech.

Causes

Causes include:

  • Hearing disorders and deafness
  • Voice problems, such as dysphonia or those caused by cleft lip or palate
  • Speech problems like stuttering
  • Developmental disabilities
  • Learning disabilities
  • Autism spectrum disorder
  • Brain injury
  • Stroke

Some speech and communication problems may be genetic. Often, no one knows the causes. By first grade, about 5% of children have noticeable speech disorders. Speech and language therapy can help.

Frequently Asked Questions

Therapists use standardized assessments to compare a child's skills against age-appropriate norms. They evaluate articulation (sound production), language comprehension, and social communication. A diagnosis is made when the gap between the child's current ability and expected norms is significant enough to impact learning or social interaction. They also rule out hearing loss, which is a common reversible cause of apparent speech delays.
Many childhood speech disorders, such as articulation errors or mild stuttering, can be resolved completely with a finite course of therapy. However, conditions resulting from neurological events like stroke, traumatic brain injury, or neurodegenerative diseases may require ongoing management. For developmental conditions like autism spectrum disorder, therapy focuses on building functional communication skills that improve over time, but maintenance sessions may be needed to prevent regression.
There is no single "right" age, but early intervention is significantly more effective. If a child is not using single words by 15 months, two-word phrases by 24 months, or if their speech is unintelligible to strangers by age 3, a pediatrician should be consulted for a referral. For older children or adults, therapy should begin as soon as a disorder is identified, as neural plasticity allows for improvement at any age, though younger patients often progress faster.
Parents should follow specific home programs provided by the therapist, which often include modeling correct sounds, reading aloud to build vocabulary, and playing games that encourage turn-taking and following directions. It is crucial to avoid correcting the child harshly, which can cause anxiety; instead, use "recasting," where the parent repeats the sentence correctly without pointing out the error, to reinforce the target skill in a low-pressure environment.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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