N/A
Completed N=28
Retrieval-Based Word Learning in Developmental Language Disorder
developmental language disorder · Specific Language Impairment · Language Development
Source: ClinicalTrials.gov NCT05325333 ↗
Enrolled (actual)
28
Serious AEs
0.0%
Results posted
May 2025
Primary outcomePrimary: Word Form Recall Accuracy (Number of Words Correctly Recalled) on Expanding and Standard Retrieval Schedules at 5 Mins — 3.93; 6.43; 3.71; 5.21 number of words recalled — p=0.567
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 our previous work to determine whether, as we have found thus far, special benefits accrue when these children must frequently recall newly introduced words during the course of learning. In this first of a series of studies, we seek to increase the children's absolute levels of learning while maintaining the advantage that repeated retrieval holds over comparison methods of learning.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Word Form Recall Accuracy (Number of Words Correctly Recalled) on Expanding and Standard Retrieval Schedules at 5 Mins |
3.93; 6.43; 3.71; 5.21 | 0.567 |
| PRIMARY Word Form Recall Accuracy (Number of Words Correctly Recalled) on Expanding and Standard Retrieval Schedules at One Week |
3.86; 6.00; 3.36; 5.57 | 0.187 |
| PRIMARY Word Meaning Recall Accuracy (Number of Semantic Associations Correctly Recalled) on Expanding and Standard Retrieval Schedules at 5 Mins |
7.29; 7.71; 7.36; 7.21 | 0.747 |
| PRIMARY Word Meaning Recall Accuracy (Number of Semantic Associations Correctly Recalled) on Expanding and Standard Retrieval Schedules at One Week |
7.00; 7.21; 6.57; 7.29 | 0.061 |
| PRIMARY Word Recognition (Number of Words Accurately Identified) on Expanding Condition and Standard Retrieval Schedules |
7.36; 7.93; 6.43; 7.79 | 0.026 sig |
| SECONDARY Peabody Picture Vocabulary Test - Fifth Edition |
95.36; 124.43 | <.0001 sig |
| SECONDARY Maternal Education in Years |
16.21; 16.57 | 0.673 |
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 (NCT05325333). 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. Informational only — not medical advice.