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NCT05004649 · ClinicalTrials.gov registry record · NA
Studying the Effects of Natural Visual Scene Changes on Typical Adult Visual Perception
A NA study of Visual Perception, sponsored by University of Pennsylvania.
- Completed
- Registry status
- NA
- Development phase
- 19
- Enrollment target
- 1
- Study location
NCT05004649: Completed NA study of Visual Perception, sponsored by University of Pennsylvania.
NCT05004649 is a NA study of Visual Perception that has completed, run by University of Pennsylvania. The registered enrollment target is 19 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower). The trial reports 1 study location across 1 state. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT05004649, a NA study of Visual Perception, has completed, sponsored by University of Pennsylvania.
- COMPLETED
- Registry status
- NA
- Development phase
- 19 participants
- Enrollment target
- 1
- Study location
Study Summary
The natural visual environment is complex and rich with different stimuli and features. The visual system must constantly extract behaviorally relevant visual information from an abundance of irrelevant information in the visual scene. To complicate matters further, the visual feature or stimulus that is most relevant at any given moment can change quickly and frequently in realistic visual environments. The mechanisms by which task-relevant information guides perceptual behavior are not fully understood. In this study, psychophysical experiments will be used to measure participants' ability to discriminate the horizontal position of a central object within a complex, natural visual scene, as well as to measure how that ability is affected by within-trial variability in the features of background objects in the scene. The goal of this study is to investigate the overarching prediction that the visual system extracts task-relevant information in a manner that reflects realistically complex visual environments in which the stimuli change quickly and frequently. Specifically, this study will test the hypothesis that task-irrelevant variability in the scene affects participants' ability to discriminate the visual feature that is relevant to the task at hand.
Primary Outcome
A psychophysical task will be used to measure participants' ability to discriminate the horizontal position of the central object that is presented within the context of background objects in a natural visual scene. The task will be a two-interval forced choice task that presents one stimulus per interval. The task will be to determine whether, compared to the central object presented in the first interval, the central object presented in the second interval is to the left or to the right. The h
Conditions Studied
Interventions
- BEHAVIORAL Psychophysical task
Study Locations (1)
Pennsylvania
- University of Pennsylvania - Philadelphia
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 19 participants |
| Start Date | 2021-08-09 |
| Est. Completion | 2022-03-23 |
| Phase | NA |
What the finished NCT05004649 record still lists
NCT05004649 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 19 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower).
The record links to 1 condition, with Visual Perception appearing as the primary indexed condition, and to 1 intervention - of which Psychophysical task is the first listed.
NCT05004649 reports a single indexed study location in Pennsylvania.
Frequently Asked Questions
What is clinical trial NCT05004649 about?
NCT05004649 is a clinical study titled "Studying the Effects of Natural Visual Scene Changes on Typical Adult Visual Perception". The natural visual environment is complex and rich with different stimuli and features. The visual system must constantly extract behaviorally relevant visual information from an abundance of irrelevant information in the visual scene. To complicate matters further, the visual feature or stimulus th...
What is the current status of trial NCT05004649?
This trial is currently completed. It is a NA study. The enrollment target is 19 participants. The study started on 2021-08-09. Estimated completion is 2022-03-23.
What conditions does trial NCT05004649 study?
This clinical trial studies the following conditions: Visual Perception.
What interventions are being tested in trial NCT05004649?
The interventions under investigation include: Psychophysical task (BEHAVIORAL).
Who is sponsoring clinical trial NCT05004649?
This trial is sponsored by University of Pennsylvania, which has 1,423 total clinical trials registered on ClinicalTrials.gov.
Where is trial NCT05004649 being conducted?
This trial has 1 study location across Pennsylvania. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
Learn More About Clinical Trials
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Where NCT05004649's enrollment target sits among peer trials
19 1861st of 2000 higher than 138 of 2,000 other NA trials
participants (enrollment target), bucketed by value
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Source ClinicalTrials.gov registry export · 2026-08-08
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