Eye Movements in Visual Search

Healthy Clinical Trial

Official title:

Eye Movement Studies of Visual Search

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT05472961
• Other study ID #: 140970
• Status: Not yet recruiting
• Phase: N/A
• Start date: April 2024
• Est. completion date: April 2024

Study information

• Verified date: January 2024
• Source: Vanderbilt University
• Contact: Thomas Palmeri, PhD
• Phone: 615-343-7900
• Email: thomas.j.palmeri[@]vanderbilt.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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.

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.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 50
• Est. completion date: April 2024
• Est. primary completion date: April 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 50 Years

Eligibility

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

Related Conditions & MeSH terms

• Healthy

Intervention

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.

Locations

Country	Name	City	State
United States	Vanderbilt University	Nashville	Tennessee

Sponsors (1)

Lead Sponsor	Collaborator
Vanderbilt University

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Eye Tracking Data	Saccade Events, Fixation Events, Pupil Size	During 1-2 hour experimental session
Primary	Response Data	Response Time, Error Rate	During 1-2 hour experimental session