Adults 3 to 6, any sex, with Language Development Disorders or Speech Sound Disorder. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Treatment Probe Accuracy ChangePrimary· Change in percentage of consonant or consonant cluster accuracy (depending on Arm/Group) from first treatment session to final treatment session; up to 6 weeks.
The Treatment Probe is made of the selected treatment stimuli (words) that are consistent with the child's assigned experimental condition, and evaluates production accuracy of the treatment target within the verb stimuli. The treatment targets in these words have a consonant singleton or consonant cluster ("tee" vs. "tree", "sees" vs. "seats"), and are mono- or bi-morphemic contexts ("tease" vs. "sees"). Children are asked to pronounce each word following presentation of a corresponding picture and a verbal prompt. The Treatment Probe allows us to track the effectiveness of treatment on the t
Group
Value
95% CI
Mono-morphemic Cluster PD
26
± 36
Bi-morphemic Cluster PD
23
± 38
Generalization Probe Accuracy ChangePrimary· Change in percent consonant accuracy from baseline to immediately following final treatment session; up to 6 weeks.
The Generalization Probe consists of words and phrases that target each consonant, cluster, and morpho-syntactic constructs a minimum of 10 times across relevant contexts (i.e., word- and utterance-position). The Generalization Probe allows us to track the effects of treatment (generalization) to untreated stimuli and to monitor control variables by measuring production accuracy of stimuli. The Generalization Probe samples each consonant and consonant cluster of the target language across multiple words and contexts. Children are asked to pronounce each word following presentation of a corresp
Group
Value
95% CI
Mono-morphemic Cluster PD
2
± 7
Bi-morphemic Cluster PD
1
± 5
Sponsor's own description
Phonological disorder (PD) and specific language impairment (SLI) directly impact a child's ability to communicate and are among the most prevalent developmental disorders. The proposed experiments manipulate the complexity of treatment targets to identify the most efficacious treatment approaches for English- and Spanish-speaking children aged 3 to 6 years who present with these disorders. This research will reveal the nature of interactions between sound and structure in language for these children and will have significant implications for a unique approach to target selection when treating persistent phonological and grammatical difficulties in children with PD, SLI, or both.
Publications & conference data
4 peer-reviewed publications reference this trial (live from Europe PMC):
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by San Diego State University
Last refreshed: 9 March 2023
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT03977701.