Visual Stimulus Competition

November 12, 2018 updated by: Daniel R. Coates, University of Houston
In this study, we will use behavioral methods to investigate several types of interactions that occur when visual stimuli conflict, such as when objects are presented nearby to each other, or to separate eyes. We will target purely sensory aspects by using simple geometric shapes: letters and lines. Our outcome measure will be performance thresholds.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Participants will be shown visual stimuli on displays and be asked to identify some aspect of the stimuli: their orientation and/or color, the existence of binocular suppression, etc.

In different blocks, stimuli will be manipulated in different ways to characterize basic aspects of visual processing. For example, the contrast, color, and/or spatial layout of stimuli will be varied.

Study Type

Interventional

Enrollment (Anticipated)

10

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
    • Texas
      • Houston, Texas, United States, 77204
        • University of Houston, College of Optometry

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Normal Vision
  • English language

Exclusion Criteria:

  • Less than 20/20 in either eye
  • Vision-affecting abnormalities (amblyopia, keratoconus, etc.)
  • Ortho-K lenses

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: Single Arm
Behavioral: Item spacing
Spatial proximity of items to one another

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Detection probability
Time Frame: 2 hours
Ability to detect a target stimulus as a function of flanker proximity
2 hours

Collaborators and Investigators

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

Sponsor

University of Houston

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)

November 1, 2018

Primary Completion (Anticipated)

November 1, 2019

Study Completion (Anticipated)

November 1, 2019

Study Registration Dates

First Submitted

November 12, 2018

First Submitted That Met QC Criteria

November 12, 2018

First Posted (Actual)

November 15, 2018

Study Record Updates

Last Update Posted (Actual)

November 15, 2018

Last Update Submitted That Met QC Criteria

November 12, 2018

Last Verified

November 1, 2018

More Information

Terms related to this study

Other Study ID Numbers

  • STUDY00001197

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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