N/A
N=31
Retrieval-Based Word Learning in Developmental Language Disorder: Verb Learning
Developmental Language Disorder · Specific Language Impairment · Language Development
Bottom Line
View on ClinicalTrials.gov: NCT06001866 ↗Enrolled (actual)
31
Serious AEs
0.0%
Results posted
Aug 2025
Primary outcome: Primary: Verb Recall Accuracy (Number of Verbs Correctly Recalled) in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions at 5 Mins. for Learned Items — 3.79; 5.31; 2.86; 3.38 number of verbs recalled — p=<0.0001
Study Design & Population
- Study type
- Interventional
- Phase
- N/A
- Interventions
- Retrieval-based verb learning: Repeated Spaced Retrieval condition (Behavioral); Retrieval-based verb learning: Repeated Study condition (Behavioral)
- Age
- Pediatric · 0+ yrs
- Sex
- All
- Sponsor
- Purdue University
- Primary completion
- Jan 2024
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Verb Recall Accuracy (Number of Verbs Correctly Recalled) in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions at 5 Mins. for Learned Items |
3.79; 5.31; 2.86; 3.38 | <0.0001 sig |
| PRIMARY Verb Recall Accuracy (Number of Verbs Correctly Recalled) in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions at 5 Mins. for Generalized Items |
3.79; 4.85; 2.43; 3.46 | <0.00001 sig |
| PRIMARY Verb Recall Accuracy (Number of Verbs Correctly Recalled) in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions at 1 Week for Learned Items. |
3.64; 5.46; 3.50; 3.77 | =0.78 |
| PRIMARY Verb Recall Accuracy (Number of Verbs Correctly Recalled) in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions at 1 Week for Generalized Items |
3.57; 5.38; 3.57; 3.92 | =1.00 |
| PRIMARY Accuracy of Verb Recall (Number of Verbs Correctly Recalled) in a New Structure in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions |
5.29; 10.23; 5.57; 7.38 | =0.75 |
| PRIMARY Verb Recognition (Number of Words Accurately Identified) in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions for Learned Items. |
7.00; 7.92; 7.00; 8.00 | <0.00001 sig |
| PRIMARY Verb Recognition (Number of Words Accurately Identified) in Repeated Spaced Retrieval (RSR) and Repeated Study (RS) Conditions for Generalized Items. |
7.36; 7.61; 7.14; 7.77 | =0.16 |
| SECONDARY Peabody Picture Vocabulary Test, Fifth Edition |
98.07; 116.69 | =.54 |
| SECONDARY Maternal Education in Years |
16.71; 17.42 | <.001 sig |
Summary
Children with developmental language disorder (DLD; also referred to as specific language impairment) experience a significant deficit in language ability that is longstanding and harmful to the children's academic, social, and eventual economic wellbeing. Word learning is one of the principal weaknesses in these children. This project focuses on the word learning abilities of four- and five-year-old children with DLD. The goal of the project is to build on the investigators' previous work to determine whether, as has been found thus far, special benefits accrue when these children must frequently recall newly introduced words during the course of learning. The focus of the current study is verb-learning. The goal of the study is to increase children's absolute levels of verb learning while maintaining the advantage that repeated retrieval holds over comparison methods of learning.
Eligibility Criteria
Inclusion Criteria
- a significant deficit in language ability (language test score below cutoff for best sensitivity/specificity) or documented age-appropriate language ability.
normal hearing no evidence of neurological damage or disease scores on tests of nonverbal intelligence above the intellectual disability range not within Autistic range on Autism screening test native English speaker (can be bilingual)
Exclusion Criteria
- failed hearing screening known neurological damage or disease scores on tests of nonverbal intelligence below the intellectual disability range (standard score less than 75) autism spectrum disorder non-native English speaker
Data sourced from ClinicalTrials.gov (NCT06001866). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.