Language Control Across Modalities

NCT ID: NCT07226921

Last Updated: 2025-11-12

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

360 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-08-06

Study Completion Date

2030-07-31

Brief Summary

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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.

Detailed Description

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Conditions

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Healthy

Keywords

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language control bilingual adults reaction time

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

FACTORIAL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

SINGLE

Participants

Study Groups

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Predictable one-language production & both-language comprehension

Group Type EXPERIMENTAL

Predictability

Intervention Type BEHAVIORAL

Whether the task of the next trial (comprehension or production) is predictable

language context

Intervention Type BEHAVIORAL

whether both languages or only one language is involved in the current block

Predictable both-language production & both-language comprehension

Group Type EXPERIMENTAL

Predictability

Intervention Type BEHAVIORAL

Whether the task of the next trial (comprehension or production) is predictable

language context

Intervention Type BEHAVIORAL

whether both languages or only one language is involved in the current block

Unpredictable one-language production & both-language comprehension

Group Type EXPERIMENTAL

Predictability

Intervention Type BEHAVIORAL

Whether the task of the next trial (comprehension or production) is predictable

language context

Intervention Type BEHAVIORAL

whether both languages or only one language is involved in the current block

Single language comprehension and production

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Predictability

Whether the task of the next trial (comprehension or production) is predictable

Intervention Type BEHAVIORAL

language context

whether both languages or only one language is involved in the current block

Intervention Type BEHAVIORAL

Eligibility Criteria

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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
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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

NIH

Sponsor Role collaborator

University of California, San Diego

OTHER

Sponsor Role lead

Responsible Party

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Chuchu Li

Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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UCSD

San Diego, California, United States

Site Status RECRUITING

Countries

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United States

Facility Contacts

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Chuchu Li

Role: primary

Other Identifiers

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R01HD116841

Identifier Type: NIH

Identifier Source: secondary_id

View Link

806634

Identifier Type: -

Identifier Source: org_study_id