Chapter 5
Light consisting of only one wavelength.
What is Monochromatic Light
Two processes where our eyes physically change to allow us to perceive depth
What is accommodation and convergence.
A visual illusion in which two stimuli separated in time and location are perceived as a single stimulus moving between the two locations.
Selectively attending to some information by moving one’s eyes.
What is overt attention?
Loss of color vision caused by brain damage.
What is achromatopsia.
When a photopigment loses its ability to absorb light for a period of time after undergoing photoisomerization.
What is photopigment bleaching.
A position-based depth cue where one object partially hides another object. The simple idea is that we can infer that one object is closer than the other.
What is partial occlusion.
The motion of an organism/object that is capable of autonomously altering its movement.
What is Animate Motion?
The theory that all sensory information is registered as physical signals but that attention selects only some of those signals to be interpreted for meaning, with the rest being filtered out.
What is filter theory of attention?
An imaginary surface defined by the locations in a scene from which objects would project retinal images at corresponding points.
What is an horopter?
The perception of a surrounded color as shifted toward the complement of the surrounding color.
What is color contrast.
A size-based depth cue that operates on the assumption that two or more objects are about the same size.
What is relative size.
Movements of the eye that are rapid and are evident when we change our focus from one object to another. Lets say when you are doing your homework on your laptop, and then you phone flashes and vibrates off to the side.
Failure to perceive a fully visible but unattended visual object
What is attentional blink?
An illusion where a near and far object seem to be at about the same depth because of the way they’re aligned and the way they are interacting.
What is the forced perspective?
The perception of a surrounded color as shifted toward a non-completmentary surrounding color. Known as a “spreading effect”.
What is color assimilation.
As a dynamic depth cue- it is a hint about depth by examining the difference in the speed and direction with which objects appear to move in the retinal image as an observer moves within a scene.
The visual system’s suppression of neural signals from the retina during saccadic eye movements.
What is saccadic suppression?
Searching a display for an item that differs from all other items in the display by having a particular combination of two or more features
What is a conjunction search?
Neurons in area V3A that respond to real motion of objects in the environment. They combine retinal information with information about the eye movements.
What are real motion cells?
A person lacking S-Cones
What is tritanopia.
A depth cue based on differences in the relative positions of the retinal images of objects in the two eyes.
What is Binocular disparity?
A copy of an eye-movement command from the superior colliculus to the extraocular muscles, sent to the brain to inform the visual system about upcoming eye movement; used to ensure a stable visual experience even during eye movements.
The problem faced by the visual system of perceiving which visual features belong to the same object
What is the binding problem?
The ability to point to and sometimes discriminate visual stimuli without any conscious awareness of them.
What is blindsight?