Language Control Across Modalities

November 7, 2025 updated by: Chuchu Li, University of California, San Diego

Language Control Across Comprehension and Production in Unimodal and Bimodal Bilinguals

This study aims to investigate how unimodal bilinguals who speak two languages and bimodal bilinguals who speak one language and sign another control languages across comprehension and production. Participants will complete different language tasks (e.g., classify a word, name a picture) in different languages, and their behavioral performance will be assessed, including accuracy and reaction time.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

360

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Proficient in both Mandarin and English, or proficiency in both ASL and English

Exclusion Criteria:

  • Know a third language better than Mandarin/English or better than ASL/English
  • With language disorder or other neurological disorders

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Factorial Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Predictable one-language production & both-language comprehension
Behavioral: Predictability
Whether the task of the next trial (comprehension or production) is predictable
Behavioral: language context
whether both languages or only one language is involved in the current block
Experimental: Predictable both-language production & both-language comprehension
Behavioral: Predictability
Whether the task of the next trial (comprehension or production) is predictable
Behavioral: language context
whether both languages or only one language is involved in the current block
Experimental: Unpredictable one-language production & both-language comprehension
Behavioral: Predictability
Whether the task of the next trial (comprehension or production) is predictable
Behavioral: language context
whether both languages or only one language is involved in the current block
No Intervention: Single language comprehension and production

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Switch costs in different contexts
Time Frame: An average of one year for each condition
An average of one year for each condition

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of California, San Diego

Collaborators

Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 6, 2025

Primary Completion (Estimated)

May 31, 2030

Study Completion (Estimated)

July 31, 2030

Study Registration Dates

First Submitted

November 6, 2025

First Submitted That Met QC Criteria

November 7, 2025

First Posted (Actual)

November 12, 2025

Study Record Updates

Last Update Posted (Actual)

November 12, 2025

Last Update Submitted That Met QC Criteria

November 7, 2025

Last Verified

September 1, 2025

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 806634
  • R01HD116841 (U.S. NIH Grant/Contract)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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