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Assistant Professor Jonathan L. Preston is a certified speech-language pathologist whose research involves causes of and treatments for speech sound disorders with a focus on persisting articulation errors and childhood apraxia of speech. His work includes visual feedback treatments for speech, including ultrasound imaging of the tongue. His work also involves speech sound errors, phonological processing, neurolinguistic basis of speech, language and literacy difficulties. He has also done work on the neurobiological basis of speech sound disorders in children.

Dr. Preston directs the Speech Production Laboratory with the mission to develop, evaluate, and disseminate neurolinguistically-motivated and evidence-based assessments and treatments for speech sound disorders. Dr. Preston is also a faculty member of the .