Visual Stimulus Competition

University of Houston10 enrolled

Overview

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.

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

Allocation

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Visual Pathway Disorder

Interventions

Item spacingBEHAVIORAL

Spatial proximity of items to one another

Eligibility

Sex: ALLHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Normal Vision * English language Exclusion Criteria: * Less than 20/20 in either eye * Vision-affecting abnormalities (amblyopia, keratoconus, etc.) * Ortho-K lenses

Locations (1)

University of Houston, College of Optometry

Houston, Texas, United States

Outcomes

Primary Outcomes

Detection probability

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

Time frame: 2 hours

Data from ClinicalTrials.gov

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