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Unit 3: Sensation and Perception - Coggle Diagram
Unit 3: Sensation and Perception
vision
👁
-
Wavelength
: the ditence between each peak
hue
: determine by wavelength
Intensity
: determine by amplitude
Amplitude
: the hight
Short
wavelength: blueish color 🟢 🔵 🟣
long
wavelength: reddish color. 🔴 🟠 🟡
structure
of our eye ball
Pupil
: the adjustment, light come in
lens
: change shape help to focus on retina
The lens focuses the rays by changing its curvature in a process called
accommodation
.
retina
: the light sensitive surface, resive the up side down image
rods
: black, white, and grey color, periphery, high capture with dim light, low capture of color, low capture of details
cones
: daily, light, detail
optic nerve:
carries neural impulses from the eye to the brain.
blind spot:
a place on retina, optic nerve leaves the eye, creating a “blind” spot because no receptor cells are located there.
fovea
: the central focal point in the retina, around which the eye’s cones cluster
Cornea
Iris
: determine your eye color, control how long Pupil open
Visual information processing
:
process
: light ➡️rod and cones ➡️Bipolar cell ➡️ganglion cell ➡️ optic nerve ➡️visual area of thalamus ➡️occipital lobe ➡️feature detectors➡️ Parallel processing➡️recognization
feature detectors
: nerve that detect specific element such as shape
Parallel
processing: process manythings at the same time
Color Vision
Young Helmholtz trichromatic ( Three color) theory
: red green blue
Opponent Processing Theory
: red&green, blue&yellow
Vision organization
Gestalt
: an organized whole
grouping
proximity
:We perceive smooth, continuous patterns rather than discontinuous ones.
similarly
: we group the same shape together
Continuity
: We group nearby figures together.
Closure
: We fill in gaps to create a complete, whole object
Depth perception
Visual cliff
:nfants and young animals
binocular cues:
epth cues, such as retinal disparity, that depend on the use of two eyes.
retinal disparity:
difference between two eye can tell us how depth
Monocular cue
: depth cues, such as interposition and linear perspective, available to either eye alone.
Motion Perception
phi phenomenon
:
Relative height
Relative motion
Relative size
Interposition
Light and shadow
Linear perspective
Perceptual Constancy
: erceiving objects as unchanging
color constancy
: perceiving familiar objects as having consistent color
Touching
🙌
Skin
: the largest sense organ
touch localization:
depends on the lengths if the path to the brain
Pain:
tells us we are in danger
Gate control theory
Spinal cord:
contains a neurological “gate” that blocks pain signals or allows them to pass on to the brain.
when
injury
small: activities and open the gate
large: shut the gate
Biopsychosocial
: Bio, social, psy
sensation and perception
-
sensation
: detect physical energy from the environment.
perception
: het the information by giving meaning by organizing of interpreting sensation
-
bottom-up processing
: sensory receptors ➡️higher level
Top-down processing
: experience and expectation➡️sensory and perception. we interpret what our senses detect
Selective attention
: the focusing of conscious awareness on particular stimulus :red_cross: 👀
change blindness:
fail to notice the changing
choice blindness
: blind to their own choice
Inattention Blindness:
fail to see one object because your attention is not there
transduction:
conversion of one from of energy to another
Psychophysics
: relationships between two subject
sensory threshold
absolute
threshold: at lets 50% energy can be detected
subliminal:
the stimuli that cannot be detected 50%
Signal detection theory
: predicts when we will detect weak signals.
seek to understand why people respond differently to the same stimuli
prime
: the unconsciously activation of certain associations, thus predisposing one’s perception, memory, or response.
difference
threshold: at 50% of difference can be detected
Weber’s law
: for an average person to perceive a difference, two stimuli must differ by a constant minimum percentage
Sensory Adaptation
:you will be adapt and loss some sensitivity of the stimuli if you constantly feel it
Influence on Perception
perceptual set:
a set of ,metal tendencies that greatly affect our perception
priming
context effect
auditory
👂
structure
Outer ear
bones
waves
Auditory canal
middle ear
Eardrum
-
anvil
Stirrup
Hammer
inner ear
Oval window
Cochlea
: sound waves traveling through
Protruding hair cells
Basilar membrane
Motion of fluid in the cochlea
Auditory nerve ➡️ Auditory cortex
organ of Corti: a structure in the cochlea of the inner ear which produces nerve impulses in response to sound vibrations.
-
Frequency ➡️pitch
low
high:
:
Amplitude ➡️loudness
hearing loss
conduction hearing loss:
damage to the mechanical system , damage in the process
sensorineural hearing loss
: damage to cochlear
Taste
👅
basic tastes
salty🧀 ➡️sodium
sour🧃 ➡️possible toxic
sweet🍭 🍬 ➡️energy
bitter🥵 ➡️possible poisons
umami 👺➡️grow
chemical sense
tongue⏩200 or more taste buds
each taste bud➡️50 to 100 taste receptor cells
Small
👃
process
: odor molecules oder ants bind to receptors➡️ receptor ➡️axons ➡️ brain
Age and gender with smell
time➡️decline
women➡️better
Smell and memory
hippocampus: association
Anosmia➡️ complete loss of the ability of smell
Pheromones➡️hormone
Kinesthesis
: Body position and movement 🤸♂️
a vestibular sense
involve eye and
ear
vestibular sacs: awareness of body balance in ear