Related Experiment Video
Updated: Jun 24, 2026
11:15
Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
Published on: February 20, 2014
Processing of natural images is feedforward: a simple behavioral test.
Thomas Schmidt1, Filipp Schmidt
1Department of Experimental and Cognitive Psychology, University of Giessen, Otto-Behaghel-Str. 10F, D-35394 Giessen, Germany. thomas.schmidt@psychol.uni-giessen.de
Attention, Perception & Psychophysics
|March 24, 2009
Summary
Visuomotor priming effects reveal the initial processing stage of visual information. This study shows that early visual processing is feedforward, unaffected by later target information.
Area of Science:
- Cognitive Neuroscience
- Visual Perception
- Motor Control
Background:
- Rapid image classification suggests initial processing relies on a single pass through the visuomotor system.
- Understanding the sequential nature of visual information processing is crucial for explaining perception-action links.
Purpose of the Study:
- To investigate whether visuomotor priming effects reflect the first pass of information through the visuomotor system.
- To test the hypothesis of feedforward processing in rapid visuomotor tasks.
Main Methods:
- A visuomotor priming task using speeded pointing responses.
- Stimuli involved target images (e.g., animal vs. non-animal) preceded by primes of the same or opposite category.
- Primes were linked to same or opposite pointing responses.
Main Results:
- Pointing trajectories were initially guided solely by prime stimuli, irrespective of target information.
- Prime and target signals demonstrated strict sequential processing.
- Behavioral data met stringent criteria for feedforward processing (rapid-chase criteria).
Conclusions:
- Visuomotor priming effects capture the output of the initial feedforward pass in the visuomotor system.
- Recurrent information does not influence this very first stage of processing.
- This supports the theory of rapid, single-pass analysis for natural image classification.
Related Concept Videos
01:20Parallel Processing
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
01:28Automatic Processing and Automatic Social Behavior
Automatic processing refers to the cognitive operations that occur without conscious intent or awareness, playing a fundamental role in shaping social cognition and behavior. These processes enable individuals to navigate complex social environments efficiently by relying on mental shortcuts and pre-existing knowledge structures known as schemas. One of the most influential mechanisms underlying automatic processing is priming, which subtly activates mental representations through exposure to...
01:24Vision
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
01:26Visual System
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...