Ch 2 Vision Flashcards

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0
Q

Perception

A

The psychological process through which we interpret sensory stimulation

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1
Q

Sensation

A

The stimulation of sensory receptors and the transmission of sensory information to the central nervous system

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2
Q

Absolute threshold

A

The weakest amount of a stimulus that can be sensed

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3
Q

Difference threshold

A

The minimum amount of difference that can be detected between two stimuli

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4
Q

What is the stimulus for vision

A

Electromagnetic energy

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5
Q

What are the receptors for hearing

A

Hair cells of the inner ear

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6
Q

What is the threshold for smell

A

One drop of perfume diffused throughout a small house

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7
Q

What is the stimulus for taste

A

Chemical substances in saliva

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8
Q

What are the receptors for touch

A

Nerve endings in the skin

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9
Q

What are the receptors for vision

A

Rods and cones in the retina

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10
Q

What is the threshold for hearing

A

The ticking of a watch from about 20 feet away in a quiet room

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11
Q

What is the stimulus for smell

A

Chemical substances in the air

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12
Q

What are the receptors for taste

A

Taste buds on the tongue

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13
Q

What is the threshold for touch

A

The wing of a fly falling on a cheek from a distance of about .4 inches

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14
Q

What is the threshold for vision

A

A candle flame view it from a distance of about 30 miles on a dark night

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15
Q

What is the stimulus for hearing

A

Soundwaves

16
Q

What are the receptors for smell

A

Receptor cells in the nose

17
Q

What is the threshold for taste

A

About 1 teaspoon of sugar dissolved into 2 gallons of water

18
Q

What is the stimulus for touch

A

Pressure on the skin

19
Q

Signal detection theory

A

Method of distinguishing sensory stimuli that takes into account not only their strengths but also such elements of the setting your physical state your mood in your attitudes

20
Q

Sensory adaptation

A

The process by which we become more sensitive to wake stimuli and less sensitive to unchanging stimuli

21
Q

The pupil

A

The opening in the colored part of the eye that determines the amount of light that can enter

22
Q

The lens

A

Adjusts to the distance of objects by changing its thickness

23
Q

Retina

A

The sensitive surface in the eye that consists of neurons

24
Q

Photoreceptors

A

Neurons that are sensitive to light

25
Q

Blind spot

A

Point where the optic nerve leave the eye and contains no photoreceptors

26
Q

What are the two kinds of photo receptors

A

Rods and cones

27
Q

Sensitive only to the brightness of light allow us to see in black and white

A

Rods

28
Q

Provide color vision

A

Cones

29
Q

Visual acuity

A

Sharpness of vision

30
Q

Complementary colors

A

Colors across from each other on the color Circle

31
Q

After image of a color

A

It’s complementary color