Psych Flashcards
Positive reinforcement
Desirable stimulus added after behavior increases
Negative reinforcement
Undesirable stimulus removed after behavior increases
Positive punishment
Undesirable stimulus added after behavior decreases
Negative Punishment
Desirable stimulus removed after behavior decreases
Avoidance learning
Future undesirable stimulus prevented, neg. reinforcement
Escape learning
Current undesirable stimulus removed, neg. reinforcement
Webers law
Shows just noticable difference, as intensity increases, differences increases
Webers law equation
delta I= IK
Absolute threshhold
intensity needed to detect
somatosensation
thermo, mechano (pressure), noci (Pain), propioperception (position)
What determines intensity
neuron firing speed
Vestibular system
balance and spatial awareness in the inner ear
What do canals of the ear detect
head rotation
signal detection theory
what point can we detect a signal? Can be a hit, miss, false alarm, correct rejection
Bottom up processing
how stimulus influences perception
Top down processing
use knowledge or expectations to influence perception
Gestalts theory uses….
similarity, pragnanz, proximity, conitunity (smooth path), closure (see as whole)
Pragnanz (gestalt)
organize to simplest form
Outer eye
sclera
Lens
bends light
Iris
color, controls pupil
cornea
bends light and protects eye
aqueous humor
fluid in cornea
ciliary body
changes lens shape
pupil
contracts and expands to let light in
vitreous humor
gel, holds lens
retina
has photoreceptors
Fovea
has cones
choroid
nourishes outer layers
Photoreceptors
rods and cones in the retina convert light to neural impulse
Rods
sensitive, night vision, periphery
What happens to rods when theres light
rods turn off and bipolar turn on which signals ganglia to signal the brain
Cones
less, color vision, centered in fovea, shows red, green, blue, and details
parvocells
sees stationary objects, has detail and color in hypothalamus
mangocells
in hypothalamus, sees movement but no features
parallel processing
see color, form, and motion simultaneously
optic chiasm
where right and left fields converge
pinna
outer ear, funnels to auditory canal and ear drum
ear drum
vibrates bones (malleus, incus, stapes)
oval window
attatches to stapes, vibrates and then signals cochlea
cochlea
vibrations hit fluid which moves to round window which signals the organ of corti and brain via auditory nerve
organ of corti
prevents fluid from going to the oval window
How does the brain recieve auditory signals
motion triggers hair cells, which allows K and Ca to flow and release Action Potential, this stimulates auditory nerve and brain
basilar tuning
cochlea distinguished sound: high frequencies activate the base, low frequencies activates hair at apex which fires AP
somatosensory homunculus
map of body in the brain
vomeronasal
detects pheromone signals and tells amygdala
alpha waves
relaxed and awake state, low frequency
beta waves
normal wake state, concentration
theta waves
light sleep, drowsy, meditation
N1 sleep
between sleep and wake, begin to make theta waves
N2 sleep
more theta waves, sleep spindle and K (keeps us asleep)
N3 sleep
slow waves, delta is deep sleep
REM sleep
dreaming, paralyzed, brain active
Freuds sleep theory
dreams represent unconcious feelings, two types: manifest (whats happening), and latent (what the hidden meaning)
Activation synthesis hypothesis
dreams are the brain making sense of random signals from the brain stem
Opiates
decrease CNS, relax, decrease HR/BP
Reward pathway
increase dopamine, decrease seratonin
dopamine
made in VTA, sent to amygdala, nucleus accumbens, prefrontal cortex, and hippocampus
Divided attention
paying attention to multiple tasks
Selective attention
select and focus on certain imput while supressing irrelevant
inattentional blindness
not focused, didnt notice even though it was right in front of you
change blindness
do not notice a change
exogenous cues
attention due to physical properties
endogenous cues
involve internal knowledge to understand (name, arrow)
late selection
assign meaning then select what to bring awareness to
early selection
all information is stored then selected out for processing
Working memory
7 plus or minus 2 peices of information, short term
explicit memory
declarative, can be clearly described… facts or events
Types of explicit memory
semantic (simple, words), episodic (events)
Implicit memory
cant define clearly with words (ex: riding a bike)
Types of implicit memory
procedural or priming (influenced by previous events)
Encoding
bringing from temporary to permanent memory
retroactive interference
when new information impairs old information
proactive interference
past learning impairs new
what parts of memory/ reasoning decreases with age
recall, episodic, processing speed, divided attention
semantic network
concepts are organized by connected ideas
spreading activation
activating one area activates related concepts (due to semantic network)
Piagets stages of learning
sensorimotor, pre-operational, concrete, formal
Sensorimotor stage
0-2 years old, object permanence
Pre Operational stage
2-7 years old, pretend play, symbols, egocentric
Concrete operational
7-11 years old, conservation and math
Formal operational stage
12+ years old, morals, consequences and abstract
heuristics
mental shortcut, reduces attempts to try or make decision which minimal effort
Availability heuristic
bias based on what comes to mind, memory
Representative heurisitc
quick judgements , judging as similar to prototype
belief perserverance bias
ignoring disconfirming facts
confirmation bias
seek only confirming facts
framing effect
bias based on how something is framed
fluid intelligence
reasoning
crystalized intelligence
accumulates and increases with age , ability to use knowledge
Theory of multiple intelligence
more than just book smarts, and intelligence is independent of other types.
What types of reasoning increases with age
semantic memory (until 60), crystalized, IQ, emotional reasoning
cognitive dissonance
discomfort due to inconsistent cognitions- we modify make less important, or make it matter less, or deny - in order to get harmony
Hawthorne effect
behaving differently due to one knowing that they are being observed
Relative deprivation
Discontent when people feel they are deprived of something that they feel entitled to
Push and pull factors
explain migration, what pushes someone out of one area and what drives them to a new one
globalization
increasing integration of cultures due to innovations- share money, culture, products
social capital
friends, family
cultural capital
education, hardwork, attractiveness
cultural relativism
theres no right or wrong cultural practices
ethnocentrism
judging ones culture relative to your own
Brocas area
speech, expression, left frontal
Wernickes
understanding, temporal
What connects brocas and wernickes area
arcurate fasiculus
agraphia
cant write
anomia
cant name
corpus callosum
connects 2 brain hemispheres
universalism
thoughts come before language, thoughts determine language
Piagent theory of language
thoughts influence language
Vigotsky theory of language
language and though are independent but we learn to connect them
linguistic determinism (weak vs. strong)
language influences thought … wharfian belives it determines thought (strong determinism)
Nativist
children are born with the ability to learn language, critical period (0-9)
Learning theory
language is acquired through reinforcement
Interactionist
biological and social factors interact for language
Limbic system
hypothalamus, amygdala, thalamus, hippocampus
Thalamus
relay station, connects to reticular
amygdala
emotions
hippocampus
short to long term memory
hypothalamus
regulated Autonomic NS and hormone release, physiological component of emotion
What sides of the brain affects emotion
positive on left, negative on right
prefrontal cortex
modulates emotions/ behavior
Autonomic NS
bodily reactions. Sympathetic vs. Parasympathetic
Sympathetic NS
fight or flight: pupils dialate, decrease digestions, increase HR, RR glucose, and adrenaline
Parasympathetic NS
rest and digest: pupils constrict, increase digestions, decresase HR, increase glucose storage
universal emotions
happy, sad, disgust, fear, anger, surprise, contempt
Cannon Bard theory
physiological response and emotions are simultaneous, but independent - subcortical part of brain
Lazarus theory
Labels and appraisal lead to emotions, based on experiences, culture, and situation
Types of stress
primary is irrelevant, secondary is harm/ threat
Types of stressors
life change, catastrophy, daily hassles, ambient stressors (unaware, integrated into society, ex is pollution)
Areas of brain involved in stress
frontal cortex, hippocampus
Brain stem
midbrain, pons, medulla
Afferent neurons
to CNS
Efferent neurons
away from CNS
atrophy vs. hypotonia
atrophy is decrease in muscle bulk, hypotonia is decrease in muscle tone