SSVEP and Distractor Processing During Visual Search

SSVEP and Distractor Processing During Visual Search in Healthy Adults

In this line of research, the researchers are utilizing an EEG measure of repeated visual stimulation, the Steady-State Visually Evoked Potential (SSVEP) to examine processing of target and distractor information during visual search. This is a basic science study.

Study Overview

• Status: Enrolling by invitation
• Conditions: Healthy
• Intervention / Treatment: Behavioral: Visual Search Information Type (target or distractor information)

Detailed Description

The researchers are interested in how the brain responds to target and distractor information during visual search. The researchers will manipulate the information available to the research participants, and measure research participants brain responses to information matching target or distractor features utilizing an EEG measure of repeated visual stimulation, the Steady-State Visually Evoked Potential (SSVEP).

• Study Type: Interventional
• Enrollment (Estimated): 50
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Pennsylvania
    • Bethlehem, Pennsylvania, United States, 18015
      • Lehigh University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 35 years (Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• normal or corrected to normal visual acuity, normal color vision

Exclusion Criteria:

• history of neurological disorders

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Within-Subjects Attentional Information; Within-Subjects, all participants receive all interventions	Behavioral: Visual Search Information Type (target or distractor information); Participants will have information about targets, distractors, or neither in different blocks of the intervention.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Steady-State Visually Evoked Response (SSVEP)	Brain response to visual stimuli flashing at a pre-defined frequency	One day (during testing)
Button Press Reaction Time	Speed to respond correctly to the target- after participant finds the target shape on a computer screen, they press a button to indicate what shape they see	One day (during testing)
Button Press Accuracy	Accuracy of responses to target item (% correct)- the researchers will measure whether the participants presses the correct button which corresponds to the target shape presented on the computer screen or the incorrect button	One day (during testing)

Collaborators and Investigators

• Sponsor: Lehigh University
• Investigators: Principal Investigator: Nancy Carlisle, PhD, Lehigh University

Study record dates

Study Major Dates

• Study Start (Actual): October 15, 2021
• Primary Completion (Estimated): November 15, 2024
• Study Completion (Estimated): May 15, 2025

Study Registration Dates

• First Submitted: November 7, 2022
• First Submitted That Met QC Criteria: November 28, 2022
• First Posted (Actual): December 1, 2022

Study Record Updates

• Last Update Posted (Actual): September 27, 2024
• Last Update Submitted That Met QC Criteria: September 26, 2024
• Last Verified: October 1, 2023

More Information

Terms related to this study

• Keywords: attention; visual search
• Other Study ID Numbers: 3R15EY030247-01A1 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: The researchers plan to share anonymized subject data on Open Science Framework.
• IPD Sharing Time Frame: Upon publication.
• IPD Sharing Access Criteria: Open Science Framework internet access.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP

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