Eye Movements in Visual Search

February 19, 2025 updated by: Thomas J. Palmeri, Vanderbilt University

Eye Movement Studies of Visual Search

Using a noninvasive eye tracker, the investigators will measure how participants move their eyes to objects arrayed on a computer screen. Participants will be asked to find one element among many.

Study Overview

Status

Withdrawn

Conditions

Intervention / Treatment

Detailed Description

The investigators measure how quickly and how accurately participants can move their eyes from a central fixation point to a target object arrayed with one or more distractor objects. A noninvasive eye tracker will be used to measure their eye movements. Participants may also be asked to make a decision about a feature of the target they have selected with a key press. Difficulty of the search for the target object and difficulty of the decision about a feature of the target object will be manipulated.

Study Type

Interventional

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

  • United States
    • Tennessee
      • Nashville, Tennessee, United States, 37240
        • Vanderbilt University

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

18 years to 50 years (Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Sona System users (open to the public)

Exclusion Criteria:

  • participants that fail the Ishihara color vision screening test
  • participants with acuity worse than 20/20 with or without correction
  • children under 18
  • adults over 50

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Within Subjects Experimental Design
All participants are tested in all conditions.
Behavioral: Target and Stimulus
The investigators manipulate the difficulty of search for the target object by manipulating the number of distractor objects and/or the similarity between the target and distractors. The investigators manipulate the difficulty of the decision about a feature by manipulating the similarity of the feature to a criterion. The investigators manipulate the timing of when the decision feature appears on the object relative to the onset of the array and/or the onset of the saccade away from fixation in a gaze-contingent manner.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Eye Tracking Data
Time Frame: During 1-2 hour experimental session
Saccade Events, Fixation Events, Pupil Size
During 1-2 hour experimental session
Response Data
Time Frame: During 1-2 hour experimental session
Response Time, Error Rate
During 1-2 hour experimental session

Collaborators and Investigators

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

Sponsor

Vanderbilt University

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)

February 20, 2025

Primary Completion (Actual)

February 20, 2025

Study Completion (Actual)

February 20, 2025

Study Registration Dates

First Submitted

July 21, 2022

First Submitted That Met QC Criteria

July 21, 2022

First Posted (Actual)

July 25, 2022

Study Record Updates

Last Update Posted (Actual)

March 25, 2025

Last Update Submitted That Met QC Criteria

February 19, 2025

Last Verified

February 1, 2025

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 140970

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Only de-identified behavioral data will be shared with other investigators upon request.

IPD Sharing Time Frame

Data will be shared after all analyses and modeling of the data are complete and manuscripts resulting from the research are accepted for publication.

IPD Sharing Access Criteria

We will share data with investigators who request (after research using the data are complete).

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ANALYTIC_CODE

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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