Related Experiment Video
Updated: May 14, 2026
10:41
VisualEyes: A Modular Software System for Oculomotor Experimentation
Published on: March 25, 2011
Visual attention: bringing the unseen past into view.
1Department of Psychology, Durham University, Durham DH1 3LE, UK. robert.kentridge@durham.ac.uk
Current Biology : CB
|January 26, 2013
Summary
New research reveals that attention can influence past events. This study demonstrates that attentional mechanisms can affect memory traces of stimuli that are no longer present.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Neuroscience
Background:
- Attention is known to enhance sensory perception, bringing even faint stimuli into conscious awareness.
- Previous understanding suggested attention primarily operates on currently available sensory information.
Purpose of the Study:
- To investigate whether attention can influence stimuli retroactively, beyond their initial presentation.
- To explore the temporal dynamics of attention and its effect on memory traces.
Main Methods:
- Utilizing psychophysical methods to present visual stimuli.
- Employing attentional cueing paradigms to direct focus.
- Measuring behavioral responses to assess the impact of attention on past stimuli.
Main Results:
- Results indicate that attention can modulate the processing of a stimulus's memory trace.
- Attending to the past allows for the enhancement of representations of stimuli that have already vanished.
- This suggests a temporal reach of attention into memory.
Conclusions:
- Attention's influence extends beyond immediate perception, affecting stored sensory information.
- The findings challenge traditional views of attention as solely a real-time processing mechanism.
- This research opens new avenues for understanding memory-attention interactions.
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...
01:21Gestalt Principles of Perception
Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
01:12Visual Agnosia
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
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...
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.
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...