Eye Movements in Visual Search

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

WITHDRAWN

Clinical Phase

NA

Study Classification

INTERVENTIONAL

Study Start Date

2025-02-20

Study Completion Date

2025-02-20

Brief Summary

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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.

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Detailed Description

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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.

Conditions

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Healthy

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Participants are asked to view an array of objects on a computer screen equipped with a noninvasive eye tracker. They are asked to search for a target object among one or more distractor objects and may be asked to respond to a feature of the target object with a key press that was selected via a gaze shift.

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Manipulation is within-participant. Participants view multiple visual search arrays in an experimental session. They will be masked with regards to the difficulty and timing manipulations until they experience them on a trial.

Study Groups

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Within Subjects Experimental Design

All participants are tested in all conditions.

Group Type EXPERIMENTAL

Target and Stimulus

Intervention Type BEHAVIORAL

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.

Interventions

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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.

Intervention Type BEHAVIORAL

Eligibility Criteria

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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

Minimum Eligible Age

18 Years

Maximum Eligible Age

50 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No