Perception Readings Flashcards

1
Q

sensation and perception are…

A

active processes

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2
Q

transduction

A

sensation requires converting energy in the world into internal signals that are psychologically meaningful.

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3
Q

sensory receptors

A

transform energy in the environment into neural impulses that can be interpreted by the brain.

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4
Q

example of SDT

A

a neurologist who recently missed a tumour on a scan is more likely to have a low threshold for reporting seeing a stimuli etc.

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5
Q

order of laws for processing

A

weber’s law, fechner’s law, stevens’ power law.

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6
Q

light is

A

electromagnetic radiation that travels in straight lines.

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7
Q

first step of seeing

A

the cornea, pupil and lens focus light on the retina.

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8
Q

second step of seeing

A

the retina transduces this visual image into neural impulses that are relayed to and interpreted by the brain.

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9
Q

aqueous humour

A

supplies oxygen and other nutrients to the cornea and lens.

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10
Q

lens

A

an elastic structure that is involved in focusing the eyes. the lens flattens for distant objects and becomes rounded for closer objects, this is called accommodation.

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11
Q

bipolar cells

A

combine information from many receptors and produce graded potentials on ganglion cells.

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12
Q

optic nerve

A

carries visual information to the brain

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13
Q

blind spot

A

also called the optic disk. is the point on the retina where the optic nerve leaves the eye and where there are no photo receptors.

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14
Q

bipolar cells and cones

A

a single cone may connect with a single bipolar cell.

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15
Q

bipolar cells and rods

A

several rods may provide input to a single bipolar cell.

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16
Q

bleaching

A

photoreceptors create graded potentials in the bipolar cells which may then fire. bleaching is the process of letting photoreceptors adjust to a change in light from bright to dark.

17
Q

dark adaption

A

is the opposite to bleaching.

18
Q

‘what pathway’

A

runs from the primary visual cortex to the temporal lobes.

19
Q

lesions in the what and where pathways

A

lesions in the what pathway leads to agnosia.

lesions in the where leads to people running into things and visual neglect.

20
Q

bionocular

A

visual input intergrated from both eyes. useful for depth perception. can pick up similarities and differences between what each eye sees.

21
Q

monocular

A

visual input from one eye.

22
Q

motion detectors

A

are ganglion cells