Effect of Word Characteristics and Orthography on Vocabulary Learning

NCT ID: NCT06935851

Last Updated: 2025-04-20

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: EARLY_PHASE1
• Total Enrollment: 23 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-02-03
• Study Completion Date: 2025-05-21

Brief Summary

The purpose of the study is to investigate how word characteristics (e.g., phonotactic probability) and orthography affect vocabulary by children with low oral language levels. The investigators will use a 2 x 2 within-subjects factorial design where every participant receives the treatment. This 12-week study aims to improve vocabulary learning efficiency for children with low oral language levels. The study's findings will uniquely contribute to the field in that this is the first research study using real words instead of nonwords while combining word learning research with vocabulary learning.

Detailed Description

The investigators are proposing a vocabulary intervention that analyzes word sounds and sound segments. This analysis offers valuable insights into how children at risk for specific learning disabilities, such as dyslexia or speech and language impairments, learn words differently from typically developing children.

Conditions

Developmental Child Delay

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: OTHER
• Blinding Strategy: NONE

Study Groups

Single group Assignment

There are no subgroups in this study. All participants will receive the intervention.

Group Type: OTHER

VOCAB +

Intervention Type: BEHAVIORAL

The purpose of the study is to investigate how word characteristics (e.g., phonotactic probability) and orthography effect vocabulary learning by children with low oral language levels. We will be using a 2 x 2 within-subjects factorial design where every participant serves as their own control. This 12-week study aims to improve the Efficiency of vocabulary learning for children with low oral language levels.

The four interventions that are all participants will be exposed to are the following: high pp words with orthography; high pp words without orthography; low pp words with orthography; low pp words without orthography.

Interventions

VOCAB +

The purpose of the study is to investigate how word characteristics (e.g., phonotactic probability) and orthography effect vocabulary learning by children with low oral language levels. We will be using a 2 x 2 within-subjects factorial design where every participant serves as their own control. This 12-week study aims to improve the Efficiency of vocabulary learning for children with low oral language levels.

The four interventions that are all participants will be exposed to are the following: high pp words with orthography; high pp words without orthography; low pp words with orthography; low pp words without orthography.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

Score of 85 or lower on the Clinical Evaluation of Language Fundamentals - CELF (4) Enrolled in or just completed third grade.

Exclusion Criteria

Any diagnosis of sensory impairments A diagnosis of autism or traumatic brain injury

• Minimum Eligible Age: 8 Years
• Maximum Eligible Age: 9 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Arizona State University

OTHER

Sponsor Role: collaborator

Mariana Silva

OTHER

Sponsor Role: lead

Responsible Party

Mariana Silva

Doctoral Student

Responsibility Role: SPONSOR_INVESTIGATOR

Locations

Osborn District School Encanto

Phoenix, Arizona, United States

Countries

United States

Provided Documents

Document Type: Statistical Analysis Plan

View Document

Study Documents

Document Type: Study Protocol

signing a data agreement

View Document

Other Identifiers

STUDY00020728

Identifier Type: -

Identifier Source: org_study_id