The Effect of Semantic Support on Word Learning

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

32 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-06-10

Study Completion Date

2026-12-01

Brief Summary

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The goal of this clinical trial is to compare word learning outcomes in late talking toddlers who are taught different types of words. The main question it aims to answer is if teaching words that come from categories that children already know (e.g., animals) will aid overall word learning. Children will take part in the Vocabulary Acquisition and Usage for Late Talkers (VAULT) word learning treatment and be taught words from more familiar or less familiar categories to see which group learns more words overall.

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Detailed Description

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Children will be assigned to either the familiar or less-familiar word group. All children will receive 8 weeks of Vocabulary Acquisition and Usage for Late Talkers (VAULT) word learning treatment (2x/wk for 30 minutes each session). The investigators will measure how well children learn the words they are taught as well as the words that are in the environment, but not explicitly taught (control words). This will help us know if their learning is due to treatment or maturation. The investigators will compare children to themselves (taught words v. control words) to ensure that the overall treatment is working. Then, the investigators will compare children in the familiar word group to children in the less-familiar word group to see which group learns more overall.

Conditions

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Language Development Disorders

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Using treatment effect sizes, children will be compared to themselves (treatment words v. control words) and across groups (familiar word group v. less-familiar word group).

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Caregivers

The late talkers and their caregivers will not explicitly be told what condition their child is in.

Study Groups

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Familiar Words

In this condition, children will learn new words that come from semantic categories (e.g., animals, body parts) from which they currently understand at least several words.

Group Type EXPERIMENTAL

VAULT Phase 5

Intervention Type BEHAVIORAL

This is an input-based vocabulary learning treatment based on principles of statistical learning.

Less-Familiar Words

In this condition, children will learn new words that come from semantic categories (e.g., animals, body parts) from which they currently understand few or no words.

Group Type ACTIVE_COMPARATOR

VAULT Phase 5

Intervention Type BEHAVIORAL

This is an input-based vocabulary learning treatment based on principles of statistical learning.

Interventions

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VAULT Phase 5

This is an input-based vocabulary learning treatment based on principles of statistical learning.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Native English Speaking
* Pass pure tone hearing screening or medical report of normal hearing
* 2-3 Years of age
* MCDI expressive scale \<10th percentile

Exclusion Criteria

* Parental report of other diagnoses
* Enrolled in concurrent treatment elsewhere
* Nonverbal IQ \<75 as measured by the Bayley scales
* Parents unable to consistently bring child to treatment sessions

Minimum Eligible Age

2 Years

Maximum Eligible Age

4 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No