Recruiting

Visual Search Behavior

Sponsor:

Brigham and Women's Hospital

Code:

NCT06933693

Conditions

Vision

Healthy

Attention

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Accepted

Interventions

Mixed trials

Blocked Trials

Study Details

Brief summary:

The goal is to look for qualitative differences in visual search behavior when one search is performed many times in a row compared to when multiple search tasks are intermixed. Four search tasks are tested. In the Mixed condition, the four tasks are randomly changed from trial to trial. In the Blocked condition, each task is run as a block of 100 trials.

Conditions

Vision

Healthy

Attention

Study ID

NCT06933693

Start date

Jun 1, 2024

Status verified date

Aug, 2026

Completion date

Jun 30, 2029

Anticipated

Primary completion date

Jun 1, 2029

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Pass Ishihara color vision test

Exclusion Criteria:

  • vision less than 20/25 with correction
  • history of neuromuscular or visual disorders

Study Design

Enrollment

40 participants

Anticipated

Allocation

Randomized

Intervention Model

Sequential

Primary purpose

Basic Science

Interventions and Outcome Measures

Arms

experimental: Blocked Trials

There are four search tasks in this experiment. Each task will be presented in a separate block of 100 trials

experimental: Mixed Trials

There are four search tasks in this experiment. All tasks will be randomly mixed in a single block of 400 trials.

Interventions

Mixed trials

All tasks will be randomly mixed in a single block of 400 trials.

Blocked Trials

Each search task will be presented in a block of trials.

Primary outcome measure

  • Response Time (RT) [ Time Frame: Through study completion, an average of one year ]

Central Contacts and Locations

Central contacts

Jeremy M Wolfe, PhD

6178511166jwolfe@bwh.harvard.edu

Cailey Tennyson, BA

617-525-3681ctennyson1@bwh.harvard.edu

Locations

Brigham & Women's Hospital

Recruiting

Boston, Massachusetts, United States, 02116

Contacts

Cailey Tennyson, BA

617-525-3681ctennyson1@bwh.harvard.edu

Jeremy M Wolfe, PhD

617-851-1166jwolfe@bwh.harvard.edu

Principal Investigator:

Jeremy M Wolfe, PhD

More Information

Sponsor

Brigham and Women's Hospital

Last update posted

Aug 19, 2026

Last verified

Aug, 2026

Keywords

  • visual search
  • visual attention

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Brigham and Women's Hospital on 2026-08-19.