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MCAT Psych > Sensory Perception > Flashcards

Sensory Perception Flashcards

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1
Q

horizontal cells

A

assist bipolar cells by processing and organizing visual info

edges of objects and visual contrast can discerned

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2
Q

temporal fibers

A

don’t cross paths

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3
Q

optical chiasm

A

where nasal optic fibers cross paths

nasal optic fibers cross to the opposite hemisphere

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4
Q

optic tracts

A

the pathways used by optic fibers after optic chaism

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5
Q

magnocellular

A

movement

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6
Q

parvocellular

A

fixed objects

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7
Q

visual cues

A 
allow perceptional organization
depth
form
motion
constancy
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8
Q

binocular cues

A

two eyes

give the sense of depth

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9
Q

retinal disparity

A

eyes are 2.5 inches apart which allow people to get slightly different views of objects
give idea of depth

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10
Q

convergence

A

gives depth based on how much eyeballs are turned

things are far away- muscles of yes relaxed

things close to us- muscle contract

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11
Q

monocular cues

A

give form to an object…relative size

closer object is, bigger it appears

interposition (overlap)- perception that one object is in front of another.

relative height- higher is further away

motion parallax- closer=faster

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12
Q

interposition

A

overlap
perception that one object is in front of another
object in front is closer

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13
Q

relative height

A

things higher are farther away

things lower are closer

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14
Q

shading and countour

A

using light and shadows to perceive form (depth and contours)
crater/mountain

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15
Q

sense of motion

A

things father away move slower

closer=faster

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16
Q

motion parallax

A

relative motion
things farther away move slower
things closer move faster
monocular cue

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17
Q

monocular of constancy

A

perception of object doesn’t change even if image cast on retina is different.
different types of constancy include shape constancy, color constancy

18
Q

shape constancy

A

changing shape still maintains the same shape perception

19
Q

size constancy

A

larger=closer but we still think it is same size

20
Q

hearing adaption

A

inner ear muscle- higher noise-muscle contract

dampens vibration in inner ear to protect ear drum

21
Q

touch

A

temp receptors desensitize over time

22
Q

smell

A

desensitized receptors in your nose to molecule sensory information over time

23
Q

proprioception

A

sense of position in space

sense of balance where you are in space

24
Q

sight

A

up or down regulation to light intensity

25
Q

down regulation of sight

A

light adaptation
when bright out, pupils constrict so less light enters back of eye
desensitization of rods and cones become desensitized to light

26
Q

up regulation of sight

A

dark regulation
pupils dilate
rods and cones start synthesizing light sensitive molecules

27
Q

automatic processing

A

simple and familiar tasks

28
Q

controlled processing

A

new and advanced tasks

29
Q

webers law

A

threshold when one person can detect a just noticeable difference

delta I/I =k constant

30
Q

piano tuner listens to tuning machine and notices that frequency is rising when it rises from 25 to 27. if later the machine begins emitting sounds with decreasing frequencies beginning at 200 Hz, when will the tuner notice that frequency has dropped?

A

webers law=delta I/I

2/25 = about 8%

at 200 it would be 8% so about 200-16 = 184 Hz

31
Q

absolute threshold of sensation

A

minimum intensity of stimulus needed to detect particular stimulus 50% of time

can be influenced by expectations, experience
familiarity
motivation
alertness

32
Q

subliminal stimuli

A

stimuli below the absolute threshold of sensation

33
Q

somatosensation

A

receive information about the types of somatosensation
intensity
timing
location

34
Q

types of somatosensation

A

thermoception
mechanoception
nociception
proprioception

35
Q

thermoception

A

temperature

36
Q

mechanoception

A

pressure

37
Q

nociception

A

pain

38
Q

proprioception

A

position

balance

39
Q

intensity

A

how fast neurons fire for us to notice

fast-low intensity

fast=high intensity

40
Q

timing

3 types

A

neuron encodes 3 ways for timing
non-adapting- neuron consistently fires at constant rate

slow adapting- neuron fires in beginning of stimulus and calms

fast adapting- neuron fires as soon as stimulus start then stops firing

MCAT Psych (1 decks)

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