In a crossover design, participants will be randomly assigned to receive 10 weeks/20 sessions of visual-acoustic biofeedback treatment via telepractice followed by a 10-week period of no treatment, or the same two conditions in the reverse order. Production accuracy will be assessed with standard probes (20 syllables, 30 words, and 10 sentences containing /r/ in various phonetic contexts) administered prior to the beginning of treatment (baseline), after the first 10-week phase, and again at the end of the study.
This research will meet a public health need by evaluating the efficacy of speech intervention supplemented with real-time visual-acoustic biofeedback when delivered using remote technologies.