Module 14 Basic Concepts And Vision

Front 1

Sensation

Back 1

Process of sensory receptors and nervous system receive and represent stimulus energies from our environment.

Front 2

Perception

Back 2

Process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events.

Front 3

Psychophysics

Back 3

Study of relationships between the physical characteristics of stimuli, such as their intensity, and our psychological experience of them.

Front 4

Absolute Threshold

Back 4

Minimum stimulation needed to detect a particular stimulus 50% of the time.

Front 5

Subliminal

Back 5

Below one's absolute threshold of conscious awareness

Front 6

Difference Threshold

Back 6

The minimum difference between two stimuli required for detection 50% of the time. Just Noticeable Difference (JND)

Front 7

Weber's Law

Back 7

Principle that, to be perceived as different, two stimuli must differ by a constant minimum percentage (rather than a constant amount)

Front 8

Sensory Adaptation

Back 8

Diminished sensitivity as a consequence of constant stimulation

Front 9

Rods

Back 9

Retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don't respond

Front 10

Cones

Back 10

Retinal receptors that function in daylight or well-lit conditions. Cones detect fine detail and give rise to color sensations.

Front 11

Young-Helmholtz Trichromatic Theory

Back 11

Retina has three types of color receptors and each are especially sensitive to one of three colors: red, green, blue

Front 12

Opponent-Process Theory

Back 12

As visual information leaves the receptor cells, we analyze it in terms of three sets of opponent colors: red-green, yellow-blue, white-black.