the theory that detecting a stimulus is jointly determined by the signal and the subject's response criterion.
The principle that the just noticeable difference of a stimulus is a constant proportion despite variations in intensity.
the visual process by which lenses become rounded for viewing nearby objects and flatter for viewing remote objects.
a process of adjustment by which the eyes become more sensitive to light in a dark environment
the process of adjustment by which the eyes become less sensitive to light in bright enviroments
a part of the retina through which the optic nerve passes. Lacking rods and cones, this spot is not responsive to light.
located in the back of the brain, it is the main information-processing center for visual information
neurons in the visual cortex that respond to specific aspects of a visual stimulus (such as lines and angles).
a theory of color vision stating that the retina contains three types of color receptors-- for red, blue, and green-- and that these combine to produce all other colors.
the theory that color vison is derived from three pairs of opposing receptors. The opponent colors are blue, and yellow, red and green, and black and white.
a hissing sound that results from a combination of all frequencies of the sound spectrum
chemicals secreted by animals that transmit signals-- usually to other animals of the same species.
the theory that the spinal cord contains a neurological "Gate" that blocks pain signals from the brain when flooded by competing signals.
the structures distributed throughout the body that gives us a sense of position and movement of body parts.
a rare condition in which stimulation in one sensory modality triggers sensations in another sensory modality.
a drawing that one can perceieve in different ways by reversing figure and ground.
A school of though rooted in the idea that the whole (perception) is different from the sum of it parts (sensation).
the tendency to view an object as constant in size despite changes in the size of the retinal image.
the tendency to see an object as retaining its form despite changes in orientations.
a binocular cue for depth perception involving the turning inward of the eyes as an object gets closer.
a binocular cue for depth perception whereby the closeran object is to a perceiver, the more different the image is in each retina.
monocular depth cues
distance cues, such as linear perspective, that enable us to perceive depth with one eye.
an apparatus used to test depth perception in infants and animals (Figure 3.27 makes me giggle)
An illusion in which the perceived lenght of a line is altered by the position of other lines that enclose it.
An illusion in which the perceived lenght of a line is affected by linear perspective cues.
the tendency for people to see the moon as larger when it's low on the horizon than when it's overhead.
extrasensory perseption ESP
The alleged ability to percieve something without ordinary sensory information