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An Investigation of Attentional and Inhibitory Processes During Active Visual Search in Humans
Sponsor: University of Colorado, Denver
Summary
The goal of this study is to investigate the finding that there are large individual differences in how participants move their eyes during active visual search. For example, some individuals tend to fixate, that is point their eyes steadily at a single location, for longer than other individuals before moving to another location. This experiment will use behavioral tasks to measure an individual's attentional and inhibitory functioning, and then see how each of these contributes to between-participant variability in eye movement behavior during visual search.
Official title: Contributions of Attentional and Inhibitory Functioning to Saccadic Decisions
Key Details
Gender
All
Age Range
18 Years - 65 Years
Study Type
INTERVENTIONAL
Enrollment
225
Start Date
2024-09-15
Completion Date
2026-05-15
Last Updated
2026-02-20
Healthy Volunteers
Yes
Conditions
Interventions
Contour Search Task
In this task, participants sit in front of a computer screen with their head in a chinrest to control for distance from the monitor and eye-tracking equipment. For the visual search task, participants will search for a visual target among distractors and make a response regarding its orientation. The target is defined by a contour formed through oriented Gabor patches.
Stop signal Task
In this task, participants sit in front of a computer screen with their head in a chinrest to control for distance from the monitor and eye-tracking equipment. For the stop-signal task, participants will make an eye movement to a target that appears on the screen, except on trials where a visual signal appears indicating they should cancel this behavior.
Useful field of View
In this task, participants sit in front of a computer screen with their head in a chinrest to control for distance from the monitor and eye-tracking equipment. In the useful field of view task, participants will report the location of a briefly-presented and masked target, while also responding to the identify of a central target in some blocks.
Attentional capture search task
In this task, participants sit in front of a computer screen with their head in a chinrest to control for distance from the monitor and eye-tracking equipment. For this visual search task, participants will search for a visual target among distractors and make a response regarding its orientation. The target is defined as a unique shape, and is sometimes shown with a salient distractor.
Locations (1)
University of Colorado Denver
Denver, Colorado, United States