Visual Stimulus Competition

• Sponsor: University of Houston (Other)
• Overall Status: Unknown status
• CT.gov ID: NCT03741595
• Collaborator: (none)
• Enrollment: 10
• Location: 1
• Arm: 1
• Anticipated Duration (Months): 12
• Patients Per Site Per Month: 0.8

Study Details

Study Description

Brief Summary

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.

Condition or Disease	Intervention/Treatment	Phase
Visual Pathway Disorder	Behavioral: Item spacing	N/A

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 Design

• Study Type: Interventional
• Anticipated Enrollment: 10 participants
• Allocation: N/A
• Intervention Model: Single Group Assignment
• Masking: None (Open Label)
• Primary Purpose: Basic Science
• Official Title: Visual Stimulus Competition
• Actual Study Start Date: Nov 1, 2018
• Anticipated Primary Completion Date: Nov 1, 2019
• Anticipated Study Completion Date: Nov 1, 2019

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Single Arm	Behavioral: Item spacing; Spatial proximity of items to one another

Outcome Measures

Primary Outcome Measures

1. Detection probability [2 hours]

   Ability to detect a target stimulus as a function of flanker proximity

Eligibility Criteria

Criteria

• Ages Eligible for Study: N/A and Older
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: Yes

Inclusion Criteria:

• Normal Vision

• English language

Exclusion Criteria:

• Less than 20/20 in either eye

• Vision-affecting abnormalities (amblyopia, keratoconus, etc.)

• Ortho-K lenses

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	University of Houston, College of Optometry	Houston	Texas	United States	77204

Sponsors and Collaborators

• University of Houston

Investigators

None specified.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.

• Responsible Party: Daniel R. Coates, Assistant Professor, University of Houston
• ClinicalTrials.gov Identifier: NCT03741595
• Other Study ID Numbers: STUDY00001197
• First Posted: Nov 15, 2018
• Last Update Posted: Nov 15, 2018
• Last Verified: Nov 1, 2018

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: No

Study Results

No Results Posted as of Nov 15, 2018