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| ID | Type | Description | Link |
|---|---|---|---|
| R21DC021249 | U.S. NIH Grant/Contract | View source |
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| Name | Class |
|---|---|
| National Institute on Deafness and Other Communication Disorders (NIDCD) | NIH |
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The goal of this clinical trial is to learn which speech treatment targets result in the greatest amount of speech learning in Spanish-English bilingual children with speech sound disorders. The main questions it aims to answer are:
Researchers will compare intervention effects across treatment provided in English and Spanish to see if the effect differs according to the language of intervention.
Participants will:
This study is a single-subject experimental design with staggered multiple baselines examining speech intervention for Spanish-English bilingual children with speech sound disorders. The study includes two arms based on the language of intervention (Spanish or English). Within each arm are two conditions that manipulate the linguistic complexity of the speech treatment target (simple consonant singleton or complex consonant cluster). Participants will be pseudo-randomly assigned to these arms and conditions.
The primary outcome is system-wide generalization; specifically, a) within-language and b) across-language generalization to untreated sounds. Accuracy data for the dependent variable will be derived from narrow phonetic transcription of participants' productions from speech probes in English and Spanish. The entire generalization probe is administered at each assessment visit (Pre, Post, and 1- and 2-Month Follow-Ups), and shorter subset probes targeting only monitored sounds are administered during Baselines and weekly during Treatment.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Spanish Language Intervention | Experimental | Treatment will be conducted entirely in Spanish, targeting Spanish speech sounds. Treatment will follow a drill-play format. |
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| English Language Intervention | Experimental | Treatment will be conducted entirely in English, targeting English speech sounds. Treatment will follow a drill-play format. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Speech Intervention | Behavioral | The treatment will begin with imitation, whereby the child will produce target words following the study clinician's verbal model with 1:1 clinician feedback for the accuracy of the child's productions. This will include explicit articulatory instruction (i.e., verbal and visual cues) to elicit correct target forms. When a child achieves 75% accuracy following a verbal model across 2 consecutive sessions or completes the 9th session (whichever is first), treatment will shift to spontaneous production, in which the child will produce target words spontaneously or through elicitation without a verbal model. Treatment materials will be images of treatment target words, interactive games and stories, and a standard set of toys. |
| Measure | Description | Time Frame |
|---|---|---|
| Comprehensive Probe or Monitored Sounds Probe | Accuracy data for the dependent variable will be derived from narrow phonetic transcription of participants' productions from speech generalization probes in English and Spanish. Both protocols elicit ~300 word productions and sample each singleton consonant and consonant cluster in the respective language a minimum of three times in every permissible word position. The entire generalization probe is administered at each assessment visit (Pre, Post, and 1- and 2-Month Follow-Ups), and shorter subset probes targeting only monitored sounds are administered during Baselines and weekly during Treatment. All transcriptions will be completed by research assistants unaware of the condition (simple or complex treatment target), arm of the study (English or Spanish language of intervention) or phase of the intervention study (Pre, Post, or Follow-up). | At initial visit, 2-4 times across the 2 weeks prior to intervention, once per week during the 6-week intervention, within 1 week after intervention, 1 month after intervention, and 2 months after intervention |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Philip Combiths | Contact | 3194674432 | philip-combiths@uiowa.edu |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Iowa | Recruiting | Iowa City | Iowa | 52242 | United States |
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| ID | Term |
|---|---|
| D066229 | Speech Sound Disorder |
| D013060 | Speech |
| ID | Term |
|---|---|
| D003147 | Communication Disorders |
| D065886 | Neurodevelopmental Disorders |
| D001523 | Mental Disorders |
| D014705 | Verbal Behavior |
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Two prospective treatment studies that share an identical study design, differing only in the language of treatment (Spanish or English). Both studies will employ a within- and across-subjects, single-subject experimental design (SSED) with multiple staggered baselines across two conditions (singleton consonant target vs. consonant cluster target).
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Outcomes will be determined from phonetic transcription of participants' speech during assessment sessions. All transcriptions will be completed by research assistants unaware of the condition (simple or complex treatment target), arm of the study (English or Spanish language of intervention) or phase of the intervention study (Pre, Post, or Follow-up).
The participant will be unaware of the relative complexity of their treatment target (i.e., condition: simple or complex).
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| D003142 |
| Communication |
| D001519 | Behavior |