National Speech and Language Pathologist (SLP) Appreciation Day

In speech-language pathology, “speech” refers to how sounds are produced using the mouth, tongue, and vocal cords; “language” refers to the words, grammar, and meaning people use to share ideas; and “communication” is the broader ability to send and receive messages using speech, language, gestures, writing, or augmentative tools.

Understanding these distinctions helps families recognize that a person might have difficulty with sound production but not with understanding words or may understand language well but struggle to express it clearly.  

Speech-language pathologists work with a wide range of needs beyond common sound errors.

They help people with language delays and disorders, social communication difficulties, voice problems, aphasia after stroke, cognitive-communication problems from brain injury or dementia, fluency disorders, and feeding and swallowing issues known as dysphagia.

They also support people with developmental conditions such as autism, hearing loss, and genetic syndromes that affect communication.  

Speech and language therapy uses structured practice, feedback, and repetition to help the brain build new pathways or strengthen existing ones, a process known as neuroplasticity.

For example, after a stroke or brain injury, targeted language or swallowing exercises can recruit other brain regions to take over damaged functions.

In children, early intervention can shape how developing brain networks organize skills like sound awareness, vocabulary, and social communication, which can lead to long-term gains in academic and social outcomes.  

“Speech-language pathologist,” “speech therapist,” and “speech and language therapist” are closely related titles that vary by country and workplace.

In the United States and Canada, “speech-language pathologist” is the preferred professional title and typically requires a graduate degree and licensure.

In the United Kingdom and several other countries, the equivalent role is called a “speech and language therapist.”

In everyday conversation, many people say “speech therapist,” but the scope usually includes both speech and language as well as broader communication and swallowing.  

Many professional organizations recommend seeking an evaluation as soon as a caregiver has concerns, even in the toddler years, rather than waiting to see if a child “grows out of it.”

Red flags can include not babbling by about 12 months, saying few or no words by 18 months, not combining words by around 24 months, or having difficulty following simple directions.

Early assessment allows speech-language pathologists to determine whether a delay is part of typical variation or whether intervention could help prevent later difficulties with literacy and learning.  

Adults can often benefit from speech and language therapy long after a stroke or brain injury, although progress may be slower than in the early months.

Research indicates that people with aphasia and other communication disorders can continue to make meaningful gains in language, speech clarity, and communication strategies with well-designed therapy and home practice, even in the chronic phase.

Therapy may focus on restoring skills, teaching compensatory techniques such as using keywords or gestures, and training families or caregivers to support everyday communication.  

For individuals who cannot meet their daily communication needs using speech alone, speech-language pathologists assess, select, and train people to use augmentative and alternative communication, or AAC.

This can range from simple picture boards and communication books to high-tech speech-generating devices and apps. SLPs work with families, schools, and caregivers to integrate AAC into daily routines so that the person can participate in conversation, education, work, and community life as independently as possible.