Dose Frequency RCT on DTTC in Children With CAS

Inclusion Criteria: CAS diagnosis confirmed by research team as described below (e.g., Iuzzini-Seigel et al., 2022; Shriberg et al., 2017; Strand & McCauley, 2019), 2;6-7;11 years of age at treatment commencement; English as the primary language; Exclusion Criteria: concomitant developmental disorders (including autism, global developmental delay, intellectual disability); diagnosis of severe or primary dysarthria as described below; palatal or structural orofacial anomalies as described below, uncorrected vision impairment hearing loss; receiving speech treatment elsewhere over the course of this study, although language, augmentative and alternative communication treatment, or similar non-speech treatment, would be permitted Receptive Language Index standard score less than 70 on the Receptive-Expressive Emergent Language Test, 4th edition (REEL-4; Brown et al., 2020) for children 2-3 years of age, the Clinical Evaluation of Language Fundamentals - Preschool 3rd edition (CELF-P3; Wiig et al., 2020) for children 4-5 years of age, or the Clinical Evaluation of Language Fundamentals - 5th edition (CELF-5; Wiig et al., 2013) for children 6-7 years of age, Nonverbal Index standard score less than 70 on the Reynolds Intellectual Assessment Scales- 2nd edition, Remote (Reynolds & Kamphaus, 2015), and no evidence of communicative intent, attempts at verbal communication, focused attention to the clinician's face, or demonstrated ability to imitate during the DEMSS.