Speech Sound Disorder (SSD) occurs when a child has difficulty producing or using speech sounds appropriately. These difficulties may involve the physical production of sounds ( articulation ) or the way sounds are organized and used within a language ( phonology ).

Speech sound difficulties are common in childhood, but persistent or significantly reduced speech intelligibility may require assessment by a speech-language pathologist (SLP).

What Are the Signs of a Speech Sound Disorder?

A child with an SSD may:

• Omit sounds from words

• Substitute one sound for another

• Distort sounds

• Add extra sounds

• Simplify consonant clusters

• Leave out syllables

• Have difficulty producing specific sounds

• Produce the same word differently on different occasions

• Be difficult for unfamiliar listeners to understand

Speech errors may occur in individual sounds or follow consistent phonological patterns .

Articulation Disorder vs Phonological Disorder

Articulation Difficulties

Articulation refers to difficulty physically producing a particular speech sound.

For example, a child may consistently have difficulty producing /r/ , /s/ , or another sound.

Phonological Difficulties

Phonological difficulties involve patterns in how speech sounds are organized and used.

For example, a child may consistently simplify certain sound combinations or leave out particular types of sounds.

A comprehensive assessment helps determine whether a child’s difficulties are primarily articulationbased, phonological, inconsistent, motor-speech related, or associated with another factor.

What Causes Speech Sound Disorders?

Some speech sound disorders have no clearly identified cause. Others may be associated with factors such as:

• Hearing difficulties

• Developmental or neurological conditions

• Structural differences

• Motor speech disorders

• Childhood Apraxia of Speech

• Cleft palate or other oral structural differences

• Language or phonological difficulties

A hearing assessment may also be recommended when hearing loss is suspected.

Speech Differences Are Not Always Speech Disorders

A very important part of assessment is considering the child’s language, accent, and dialect .

Children who speak more than one language may use sounds or sound patterns influenced by their other language. These differences do not automatically indicate a speech disorder .

Similarly, an accent or dialect difference should not be treated as an articulation or phonological disorder simply because it differs from mainstream English pronunciation.

How Is a Speech Sound Disorder Assessed?

An SLP may assess:

• Speech sounds in words and connected speech

• Sound errors and phonological patterns

• Speech intelligibility

• Consistency of speech errors

• Syllable and word structures

• Stimulability for target sounds

• Speech perception

• Oral structures and movement

• Hearing

• Receptive and expressive language

• Literacy-related skills when appropriate

• The languages and dialects used by the child

Assessment may include both standardized and informal measures, along with speech samples and information from parents or teachers.

How Can Speech Therapy Help?

Speech therapy for articulation and phonological disorders is individualized according to the child’s specific speech profile.

Therapy may include:

Articulation Therapy

Teaching accurate placement and production of specific speech sounds.

Phonological Therapy

Targeting patterns of sound errors to improve the child’s overall sound system.

Speech Perception

Helping children hear and identify differences between speech sounds.

Stimulability-Based Practice

Determining which sounds a child can imitate with support and selecting appropriate therapy targets.

Speech Intelligibility

Working toward clearer and more understandable speech in words, phrases, sentences, and conversation.

Language and Literacy Support

Children with speech sound disorders may also have language or literacy difficulties, so these areas should be monitored and addressed when needed.

Speech Therapy at Home

Parents can support speech development by:

• Modeling sounds correctly without excessive correction

• Practicing target sounds through short, enjoyable activities

• Reading books together

• Playing sound and rhyming games

• Giving the child opportunities to speak

• Using the child’s interests to practice target words

• Celebrating communication attempts

• Following the SLP’s home-practice recommendations

Short, consistent practice is often easier for children than long or repetitive drills.

Speech Sound Therapy at iSpeak Total Communication Clinics

At iSpeak Total Communication Clinics , speech therapy is individualized according to each child’s speech, language, and communication profile.

Therapy may focus on articulation, phonological patterns, speech clarity, intelligibility, speech perception, motor speech, and language development as appropriate.

Our goal is to help children develop clearer, more functional, and confident communication while considering their individual linguistic and cultural background.

Frequently Asked Questions

At what age should a child see a speech therapist for unclear speech?

If speech is significantly difficult to understand, errors persist beyond expected developmental patterns, or parents have concerns, an SLP assessment can help determine whether intervention is needed.

Is every mispronounced sound a speech disorder?

No. Some sound errors are part of typical speech development, while others may reflect an SSD. Age, language, dialect, and individual development should all be considered.

Is articulation the same as phonology?

No. Articulation involves producing individual speech sounds, while phonology involves how sounds are organized and used within a language.

Can bilingual children have speech sound disorders?

Yes, but being bilingual does not cause a speech disorder. Assessment should consider the child’s complete linguistic profile and distinguish language transfer from genuine speech difficulties.

Can speech therapy improve speech clarity?

Yes. Individualized speech therapy can target sound production, phonological patterns, intelligibility, and other factors affecting speech clarity.

Can speech sound disorders affect reading and writing?

Some children with SSDs may also experience language or literacy difficulties, so reading and writing development should be monitored.

References

American Speech-Language-Hearing Association (ASHA). Speech Sound Disorders: Articulation and Phonology – Practice Portal.

ASHA Practce Portal – Speech Sound Disorders: Artculaton and Phonology

Recommended citation:

American Speech-Language-Hearing Association. (n.d.). Speech sound disorders: Articulation and phonology [Practice portal]. ASHA.

Copyright note: This article is original educational content prepared for iSpeak Total Communication Clinics . It does not reproduce ASHA’s copyrighted text, tables, graphics, or proprietary content. ASHA is credited as the clinical reference and linked to the original resource.

Disclaimer: This article is for general educational purposes and does not replace an individualized assessment, diagnosis, or treatment plan from a qualified speech-language pathologist.