Speech Sound Disorder vs. Articulation Disorder: What's the Difference?

If your child is difficult to understand, you may have heard terms like articulation disorder, phonological disorder, or speech sound disorder. While these terms sound similar, they describe different types of speech difficulties. Understanding the difference can help you better understand your child's evaluation results and determine whether speech therapy may be beneficial.

Quick Answer

An articulation disorder affects how a child physically produces speech sounds, while a phonological disorder affects how a child organizes speech sounds into patterns. Both are types of speech sound disorders, but they require different approaches to treatment.

In this article, you will learn about:

What is a speech sound disorder?

Articulation disorder vs. phonological disorder

Signs your child may benefit from speech therapy

Causes of speech sound disorders

How speech sound disorders are evaluated

Treatment options

Frequently asked questions

What Is a Speech Sound Disorder?

A speech sound disorder (SSD) is an umbrella term used to describe difficulty producing speech sounds. Two of the most common types of speech sound disorders are articulation disorders and phonological disorders. Although they may sound similar, they affect speech in different ways and often require different treatment approaches.

Articulation Disorder

An articulation disorder occurs when a child has difficulty physically producing one or more speech sounds. They know what they want to say but have trouble positioning their tongue, lips, or other speech structures to produce certain sounds correctly.

For example, a child may say "wabbit" instead of "rabbit" or have difficulty producing the /s/ sound clearly.

Phonological Disorder

A phonological disorder occurs when a child can physically produce speech sounds but has difficulty using the sound patterns or rules of language correctly.

For example, a child may leave off the last sound in many words or consistently replace one group of sounds with another, making their speech difficult to understand.

What Causes Speech Sound Disorders?

In many cases, there is no single identifiable cause of a speech sound disorder. However, researchers have identified several factors that may increase a child's risk. Having one or more of these risk factors does not mean a child will develop a speech sound disorder, but they may increase the likelihood.

• Family history of speech or language disorders

• Hearing loss or frequent ear infections

• Premature birth or low birth weight

• Certain prenatal or birth complications

• Male sex (speech sound disorders occur slightly more often in boys)

Signs Your Child May Have a Speech Sound Disorder

Children develop speech sounds gradually, and it's perfectly normal for younger children to make some speech errors as they learn. However, if speech errors continue beyond the expected age or make your child difficult to understand, it may be time to speak with a speech-language pathologist.

I have included a speech-sound development chart, but it is important to note that there are variations in speech-sound development.

Signs of an Articulation Disorder

• Difficulty producing one or two specific speech sounds

• Speech errors remain consistent across words

• Others frequently ask your child to repeat themselves

• Frustration when trying to say certain sounds

Signs of a Phonological Disorder

• Leaves off sounds in many words

• Replaces groups of sounds with other sounds

• Speech is difficult to understand, even for familiar listeners

• Uses the same speech pattern repeatedly

When to Seek Help From a Speech-Language Pathologist

If you're concerned about your child's speech, trust your instincts. While some speech errors are part of typical development, persistent speech sound errors, difficulty being understood, or frustration when communicating may indicate that an evaluation is appropriate.

A speech-language pathologist can determine whether your child's speech is developing as expected and recommend treatment if needed. Early intervention often makes therapy more efficient and can help children build confidence in their communication.

How Will a Speech-Language Pathologist Evaluate my Child's Speech?

In order to assess a child’s speech, a speech-language pathologist may employ any or all of the following:

Case history

A speech-language pathologist will ask about your child's medical, developmental, educational, and family history.

Oral mechanism examination

This helps determine whether any structural differences may be affecting speech.

Speech sound assessment

Your child's speech sounds are evaluated in words, sentences, and conversation.

Speech pattern analysis

The SLP determines whether the errors are consistent with an articulation disorder, phonological disorder, or another speech sound disorder.

Language assessment (when appropriate)

Because speech and language difficulties sometimes occur together, language skills may also be evaluated.

Treatment Options for Articulation Disorders

Treatment for an articulation disorder depends on your child's age, the speech sounds involved, and how much the errors affect everyday communication. One of the most common evidence-based approaches is traditional articulation therapy.

During therapy, children learn how to correctly produce a target sound before gradually practicing it in syllables, words, phrases, sentences, and eventually everyday conversation. Sessions often include games, play-based activities, and engaging practice to help children stay motivated while building accurate speech habits.

Treatment Options for Phonological Disorders

Because a phonological disorder affects speech patterns rather than individual sounds, treatment focuses on helping children recognize and use sound patterns correctly.

Depending on the child's needs, a speech-language pathologist may use evidence-based approaches such as:

Minimal Pairs: Children practice pairs of words that differ by only one sound (such as tea and key) to help them recognize how changing one sound changes the meaning of a word.

Cycles Approach: Several speech patterns are targeted over time in a planned sequence, helping children gradually develop more accurate speech.

Phonological Awareness Activities: Children practice listening to, identifying, and manipulating sounds in words, which can support both speech production and early literacy skills.

What can Parents do at Home

If you're concerned about your child's speech, here are a few things you can do while deciding whether an evaluation is needed:

• Pay attention to the sounds or words your child has difficulty producing.

• Notice whether the errors happen consistently or only in certain words.

• Read books together and encourage conversation without correcting every mistake.

• Model the correct pronunciation naturally instead of asking your child to repeat words over and over.

• If your child's speech is difficult for others to understand or you're unsure whether their speech is developing typically, schedule an evaluation with a speech-language pathologist.

Can Children Have Both an Articulation and Phonological Disorder?

Yes. Some children have both an articulation disorder and a phonological disorder. For example, a child may have difficulty producing the /r/ sound correctly while also using a phonological process, such as leaving off the final sound in many words. During a comprehensive speech evaluation, a speech-language pathologist determines which types of errors are present so that therapy can be tailored to your child's specific needs.

How Speech Therapy can Help

Eery child learns to communicate differently, which is why speech therapy should never be one-size-fits-all. During therapy, I get to know your child's strengths, interests, and communication goals so treatment is both effective and engaging.

Sessions are individualized based on your child's age, speech sound errors, and overall communication needs. Depending on your child's goals, therapy may include:

• Learning how to produce speech sounds accurately

• Practicing new sounds through games and meaningful activities

• Improving speech clarity during conversation

• Helping new speech skills carry over into home, school, and everyday life

• Coaching parents on simple ways to support practice outside of therapy

My goal isn't just to help children say sounds correctly during therapy—it's to help them communicate more confidently in their everyday lives.

Online Speech Therapy for Speech Sound Disorders

Many children can successfully participate in online speech therapy from the comfort of home. Virtual sessions allow families to receive individualized speech therapy while eliminating travel time and making scheduling more convenient.

I provide online speech therapy for children throughout Illinois and New York.

Additional Speech Therapy Services Offered at Speak with Stephanie throughout Illinois, New York, & New Jersey

If your child also has difficulty understanding language, expressing ideas, or stutters in addition to speech sound errors, I also provide individualized therapy for those communication needs. Because speech and language skills often overlap, treatment is always tailored to the whole child—not just one diagnosis.

Frequently Asked Questions

What is the difference between an articulation and phonological disorder?

An articulation disorder affects how a child physically produces speech sounds, while a phonological disorder affects how they organize speech sounds into patterns. Both are types of speech sound disorders, but they require different treatment approaches.

Can a child have both a phonological and articulation disorder?

Yes. Some children have both an articulation disorder and a phonological disorder. During an evaluation, an SLP determines which types of speech errors are present so therapy can target each area effectively.

Are there any underlying causes for speech disorders?

Gender, pre- and perinatal problems, family history, and hearing loss have been shown to influence speech-sound disorders.

What causes a speech sound disorder?

In many cases, there is no single identifiable cause of a speech sound disorder. Researchers believe that genetics, family history, hearing loss, premature birth, and certain prenatal or birth complications may increase a child's risk. However, many children with speech sound disorders have no known risk factors, and having one or more risk factors does not necessarily mean a child will develop a speech sound disorder.

At what age should a child be able to produce certain sounds correctly?

Children develop speech sounds gradually, and the expected age varies by sound. While speech sound charts are helpful guides, every child develops at their own pace. If you're unsure whether your child's speech is developing as expected, a speech evaluation can provide individualized guidance.

How can a speech-language pathologist help my child?

A speech-language pathologist will assess, diagnose, and devise and implement an individualized treatment plan for your child to treat articulation and/or phonological disorders.

How long does it typically take for a child with a phonological disorder or articulation disorder to improve with speech therapy?

Every child progresses at their own pace. The length of therapy depends on factors such as the number of speech sounds affected, the type of speech sound disorder, your child's participation during sessions, and how consistently home practice is completed. Many families begin noticing improvements before speech is completely mastered.

Will my child outgrow their speech difficulties on their own or is intervention necessary?

Some speech sound errors are a normal part of development and resolve naturally as children grow. Others persist beyond the expected age and benefit from speech therapy. Because it can be difficult to know the difference, an evaluation by a speech-language pathologist is often the best way to determine whether treatment is recommended.

Concerned About Your Child's Speech?

If your child is difficult to understand or you're wondering whether their speech is developing as expected, you're not alone. Many parents aren't sure whether speech errors are part of typical development or whether therapy is needed.

A comprehensive speech evaluation can provide answers, identify the type of speech sound disorder (if one is present), and help you decide on the next steps.

If you'd like to learn more about articulation therapy or schedule a free consultation, I'd be happy to answer your questions.

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About the author:  

Stephanie Jeret, M.S., CCC-SLP, is a speech-language pathologist and owner of Speak with Stephanie, a private speech therapy practice serving children, teens, and adults in Skokie and Chicago's North Shore.

With more than 10 years of experience, Stephanie provides individualized therapy for speech sound disorders, language disorders, stuttering, and other communication challenges. She offers in-home, school-based, and online speech therapy, with a focus on helping clients build practical communication skills they can use in everyday life.

Wondering if speech therapy may be a good fit for you or your child?

Schedule a free consultation with Stephanie to discuss your concerns and learn more about therapy options.