Chapter 3 Flashcards Preview

Psy 200 > Chapter 3 > Flashcards

Flashcards in Chapter 3 Deck (30):
1

Process of organizing and interpreting sensory information so that it makes sense

Perception

2

Specialized cells that detect stimulus information and transmit it to sensory (afferent) nerves in the brain

Sensory receptors

3

Detection of life, perceived as sight

Photoreception

4

Detection of pressure, vibration, and movement, perceived as touch, hearing, and equilibrium

Mechanoreceptiom

5

Detection of chemical stimuli, perceived As smell and taste

Cemoreception

6

The minimum amount of stimulus energy that a person can detect

Absolute threshold

7

The degree of difference that must exist between two stimuli before the difference is detected

Difference threshold

8

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

Weber's law

9

The detection of information below the level of conscious awareness

Subliminal perception

10

The failure to detect unexpected events when attention is engaged by a task

Inattentional blindness

11

A change in the responsiveness of the sensory system based on the average level of surrounding stimulation. Example is our eyes adjusting to the light of a recently darkened room

Sensory adaptation

12

This is a form of electromagnetic energy that can be described in terms of wavelengths

Light

13

This is the distance from the peak of one wave to the peak of the next

Wavelength

14

The height of light, this determines the brightness of the stimulus

Amplitude

15

The white outer part of the eye that helps to maintain the shape of the eye and to protect it from injury

Sclera

16

The colored part of the eye, which might be blue in one individual but dark brown and another

Iris

17

This appears black, and is the opening in the center of the iris

Pupil

18

Three visible parts of the eye

sclera, iris, pupil

19

A transparent and somewhat flexible, dislike structure filled with a gelatin like material who's function is to bend the light falling on the surface of the eye just enough to focus it at the back

Lens

20

The multilayered light-sensitive surface in the eyes that records electromagnetic energy and converts it to neural impulses for processing in the brain

Retina

21

The receptor cells in the retina that are sensitive to light but not very useful for color vision

Rods

22

The receptor cells in the retina that allow for color perception

Cones

23

This is the most important part of the retina. It is a tiny area in the center of the retina at which vision is at its best. Contains only cones

Fovea

24

The structure at the back of the eye, made up of axons of the ganglion cells, that carries visual information to the brain for further processing

Optic nerve

25

The area on the retina where the optic nerve leaves the eye on its way to the brain. It does not contain rods or cones

Blind spot

26

A point in the brain where the optic nerve fibers divide, and approximately half of the nerve fibers cross over the midline of the brain. This means that what we see on the left side of our visual field is registered in the right side of the brain and vice versa

Optic chiasm

27

Theory stating that cells in the visual system respond to complementary pairs of red green and blue yellow colors; a given cell might be excited by red and inhibited by green, whereas another cell might be excited by yellow and inhibited by blue

Opponent-process theory

28

The part of the ear that includes the oval window, cochlea, and basilar membrane and whose function is to convert sound waves into neural impulses and send them to the brain

Inner ear

29

A tubular, fluid filled structure that is coiled up like a snail

Cochlea

30

The process of receiving stimulus energies from the external environment and transforming those energies into neural energy

Sensation