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AP Psych > Unit 4 Sensation And Perception > Flashcards

Unit 4 Sensation And Perception Flashcards

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1
Q

Sensation

A

The process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment

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2
Q

Perception

A

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

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3
Q

Bottom-up processing

A

Analysis that begins with the sensory receptors and works up to the brains integration of sensory information.

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4
Q

Top-down processing

A

Information processing guided by higher-level mental processes, as when we construct perceptions of things

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5
Q

Selective attention

A

The focusing of conscious awareness on a particular stimulus.

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6
Q

Inattentional blindness

A

Failing to see visible objects when our attention is directed elsewhere

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7
Q

Change blindness

A

Failing to notice changes in the environment

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8
Q

Absolute threshold

A

The minimum stimulation needed to detect a particular stimulus 50% of the time (ex. How loud a noise has to be for u to hear it)

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9
Q

Signal detection theory

A

A theory predicting how, and when we detect the presence of the faint stimulus (signal) amid background stimulation (noise).

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10
Q

Subliminal

A

It is below one’s absolute threshold for conscious awareness.

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11
Q

Difference threshold

A

The minimum difference between two stimuli required for detection 50% of the time.

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12
Q

Webers Law

A

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

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13
Q

Sensory adaptation

A

Diminished sensitivity as a consequence of constant stimulation

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14
Q

Transduction

A

The conversion of one form of energy into another

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15
Q

Wavelength

A

The distance from the peak of one light or sound wave to the peak of the next.

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16
Q

Hue

A

The dimension of color, determined by wavelength

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17
Q

Intensity

A

The amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave’s amplitude

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18
Q

Pupil

A

The adjustable opening in the center of the eye, through which light enters

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19
Q

Iris

A

A ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening

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20
Q

Lens

A

The transparent structure behind the pupil, that changes shape to help focus images on the retina

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21
Q

Retina

A

The light sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information

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22
Q

Accommodation

A

The process by which the eyes lens changes shape to focus near or far objects on the retina

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23
Q

Rods

A

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

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24
Q

Cones

A

Retinal receptor cells that are concentrated, near the center of the retina, and that function in daylight or in well lit conditions. The cones detect fine detail and give rise to color sensations

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25
Q

Optic nerve

A

The nerve that Carrie’s neural impulses from the eye to the brain

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26
Q

Fovea

A

The central focal point in the retina around which the eyes cones cluster

27
Q

Blind spot

A

The point at which the optic nerve leaves the eye, creating a “blind” spot because no receptor cells are located there

28
Q

Feature detectors

A

Nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement.

29
Q

Parallel processing

A

The processing of many aspects of a problem simultaneously; the brains natural mode of information processing for many functions, including vision

30
Q

Young-Helmholtz trichromatic (three color) theory

A

The cones do their color magic in teams of three. The retina has three types of color receptors, and each is especially sensitive to one of the three colors, red, green, or blue.

31
Q

Opponent-process theory

A

The theory that opposing retinal processes (red-green, yellow-blue, white-black) enable color vision.

32
Q

Audition

A

The sense or act of hearing

33
Q

Frequency

A

The number of complete wavelengths that pass a point in a given time. The frequency determines the pitch

34
Q

Middle ear

A

Transmits the eardrums vibrations through a piston made of three tiny bones to the cochlea

35
Q

Cochlea

A

A snail shaped tube in the inner ear. The incoming vibrations, cause the cochlea’s membrane to vibrate, jostling the fluid that fills the two. This motion causes ripples in the basilar membrane, bending the hair cells lining its surface. The hair movement leads to the sending of neural messages to the temporal lobes auditory complex.

36
Q

Inner ear

A

The innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs

37
Q

Place theory

A

I’m hearing, the theory that links the pitch we hear with the place where the cochlea’s membranes is simulated.

38
Q

Frequency theory

A

In hearing, the theory that the rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone, thus enabling us to sense its pitch.

39
Q

What is the volley principle?

A

Like soldiers who alternate firing so that some can shoot while other ms reload, neural cells can alternate firing.

40
Q

Conduction hearing loss

A

Hearing loss caused by damage to the mechanical system that conducts sound waves to the cochlea

41
Q

Sensorineural hearing loss

A

Hearing loss caused by damage to the cochlea’s receptor cells, or to the auditory nerve through electrodes threaded into the cochlea.

42
Q

Cochlear implant

A

A device for converting sounds into electrical signals and stimulating the auditory nerve through electrodes threaded into the cochlea

43
Q

What are the four basic touch receptors?

A

Pressure, warmth, cold, and pain

44
Q

Kinesthesis

A

The system for sensing the position and movement of individual body parts.

45
Q

Vestibular sense

A

The sense of body movement and position, including a sense of balance. Located in the inner ear.

46
Q

What are nociceptors?

A

Sensory receptors that detect hurtful temperatures, pressure, or chemicals

47
Q

Gate-control theory

A

The theory that the spinal cord contains a neurological “gate” that blocks pain signals or allows them to pass onto the brain.

48
Q

Sensory interaction

A

The principle that one sense may influence another, as when the smell of food influences its taste.

49
Q

Gestalt

A

An organized whole

50
Q

Figure-ground

A

The organization of the visual field into objects that stand out from their surroundings

51
Q

Grouping

A

The perceptual tendency to organize stimuli into coherent groups

52
Q

Proximity

A

We group nearby figures together

53
Q

Similarity

A

We group similar figures together

54
Q

Continuity

A

We perceive smooth, continuous patterns rather than discontinuous ones

55
Q

Connectedness

A

Because they are uniform and linked, we perceive each set of two dots and the line between them as a single unit

56
Q

Depth perception

A

The ability to see objects in three dimensions although the images that strike the retina are two dimensional; allows us to judge distance

57
Q

Visual cliff

A

A laboratory device for testing depth perception in infants and young animals

58
Q

Binocular cues

A

Depth cues, such as retinal disparity, that depend on the use of two eyes

59
Q

Retinal disparity

A

A binocular cue for perceiving depth: by comparing images from the retina’s in the two eyes, the brain computes distance - the greater the disparity between the two images the closer the object.

60
Q

Phi phenomenon

A

An illusion of movement created when two or more adjacent lights blink on and off in quick succession

61
Q

Perceptual adaptation

A

In vision, the ability to adjust to an artificially displaced or even inverted visual field

62
Q

Perceptual set

A

A mental predisposition to perceive one thing and not another.

63
Q

Extra sensory perception (ESP)

A

The controversial claim that perception can occur apart from sensory input; includes telepathy, clairvoyance, and precognition

64
Q

Parapsychology

A

The study of paranormal phenomena, including ESP and psychokinesis.

AP Psych (12 decks)

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