P/S Flashcards
Sensory Adaptation
downregulation of a receptor over time due to being overstimulated
1. Hearing: inner ear will maintain contraction
2. Touch: temperature receptors desensitized
3. Smell: receptors get desensitized
4. Proprioreception: Body will acclimate to being off balanced by finding new equilibrium
5. Sight: eyes will adapt to high or low light conditions
Weber’s law
Law of the just noticeable difference (JND)
- Threshold where you’re able to detect ∆es in sensation
- Ex.) adding 0.5 lbs to 5 lbs vs 0.5 lbs to 200 lbs
Absolute Threshold of sensation
Stimulus needed to detect a particular stimulus 50% of the time
- Can depend on the individual and how primed they are
Subliminal stimuli
stimuli below the absolute threshold
Vestibular system f(x)
balance and spatial orientation
- Focus on the inner ear which contains the semicircular canals (detector) and endolymph (liquid)
- Shifts can be detected which can result in dizziness
Signal Detection Theory
how we make decisions under periods of uncertainty (discerning what stimuli is “important”)
- We recognize important stimuli and unimportant “noise”
Bottom up processing
stimulus influences out perception
- we process sensory info as it comes in
- Ex) we perceive small pieces of info and put them together
Top-down processing
background info informs our perception
- our perception is driven by cognition
- Ex) we know what we are looking for
Gestalt’s principles
- similarity: items that are similar are grouped together
- Pragnanz: reality is organized into simpler forms (seeing olympic symbol vs 5 rings)
- proximity: objects close together are grouped together
- continuity: lines follow the smoothest path
- closure: objects seen together are seen as a whole
Structure of the eye
- cornea: transparent sheet of tissue that focuses the eye
- anterior chamber: contains fluid that maintains shape of eye
- lens: bends light so it goes to the back of the eye
- ciliary muscle: responsible for eye movement
- vitreous chamber: filled w/ vitreous jelly and provide pressure to the eyeball
- retina: filled with photoreceptors; rods and cones
- choroid: helps to supply oxygen to the eye w/ its blood vessels
Rods (eye)
detect light
Cones (eye)
detect color
Phototransduction cascade
- Light hits retinal and causes a ∆ in conformation of larger protein rhodopsin
- Transducin, bound to rhodopsin, will unbind and bind phosphodiesterase (PDE)
- PDE converts cGMP to GMP
- low [cGMP] results in low Na+ entering into the cell, causing hyperpolarization and reduced glutamate activity
- Bipolar cell is no longer inhibited by glutamate and the optic nerve sends an impulse to the brain
Rod vs cone recovery time
Rods have slow recovery time, cones have a quick recovery time
Parallel processing
See everything @ the same time, and process what’s important from what’s not important
- see a stop sign and a Taco Bell but respond to sign Bc it’s more important
Sound is detected through
1.
2.
- pressurized sound waves
- hair cells
Bones in eardrum
malleus, incus, stapes
How does sound get transmitted from ear to brain
Fluid in the cochlea also moves back and forth in accordance w/ sound waves
- sound waves move the hairs around, which cause K+ channels to open, allowing K to flow into the cells
- Once K+ enters into the cells, Ca2+ also enters the cells and can begin the AP to activate the auditory nerve
What is the hearing threshold?
20-20,000 Hz
Basilar tuning
Varying hair cells in the cochlea are used to differentiate differing fq of noise
Tonotypical mapping
The “map” of sounds the brain makes based on its differences in fq
Somatosensation
physiological mechanism by which we manifest physical stimuli and perceive its feeling as touch, pressure and pain
Types of somatosensation
1.)
2.)
3.)
4.)
- Temperature
- Pressure (mechanoreception)
- Pain (nociception)
- Position and balance (proprioception)
Sensory amplification
upregulation in perception of stimulus
Sensory cortex
map of the brain that links to physical sensation
- physically stimulating the brain will activate feelings in certain parts of the body
Kinesthesia vs proprioception
Kinesthesia: awareness of the movement of your body
Proprioception: how we perceive the position of our bodies, especially equilibrium and balance
- Awareness of our bodies in space
TrypV1 receptor
thermoreceptor
How many mlc can bind to a olfactory receptor?
1 type of mlc
How is smell received? (Steps 1-4)
- mlc will bind to GPCR
- olfactory cell send AP to the olfactory bulb
- all receptors coalesce to the glomerulus
- Glomeruli border and fire onto the mitral/tufted cell
Pheromones
mlc that can be detected via olfactory reception
Amygdala
involved w/ emotion, aggression, mating, etc
- If destroyed, we get a mellowing effect
Gustation is what sensation?
Taste
5 tastes
bitter, salty, sweet, savory, sour
Differential association theory
a person learns deviant vehavior from those in their close social group
Labeling theory
deviant behavior in the past can cause a person to be stigmatized long-term
GPCR taste receptors
- Sweet
- Savory
- Bitter
- reception of these mlcs results in signal transduction cascade (ex. glucose binding to GPCR and causes signal cascade to fire AP to brain [very indirect])
ion channel taste receptors
- Sour
- Salty
- bind to receptor directly (ex. NaCl binds to salt receptor which causes AP to fire)
Low vs high p-values (statistical analysis)
Low p-value: high evidence = there is an effect
High p-value: low evidence/no effect
Conscienceness
awareness of self and environment
- range from alertness to sleep
Daydreaming
feel more relaxed, not focused
- can also be light meditation
Sleep waves (B-A-T-D)
Sleep: not aware of the world around you
- Beta waves (high fq): associated with awake and concentration
- Alpha waves: daydreaming, drowsy and appear in deep sleep. Happens during relaxation
- Theta waves: drowsiness right after you’ve fallen asleep
- Delta waves (low fq): deep sleep or coma
EEGs measure…
brain waves
Order of the stages of sleep
sleep happens in patterns and occurs in 90 min cycles
- N1—›N2—›N3—›N2—›REM
Non-rapid eye movement sleep stage
first stage of sleep (non-REM)
N1 stage of sleep
50:50 mix of alpha and theta waves
- Can result in mild hallucinations
- Can lead to the Tetris effect: playing Tetris before bed and you see blocks
N2 stage of sleep
Deeper stage of sleep that has majority theta waves (deep sleep)
Sleep spindles
Found in the N2 phase of sleep
- help inhibit perceptions so we maintain tranquil state while sleeping
- Allow us to sleep through loud noises
K-complexes
suppress cortical arousal and keep you asleep
- helps in sleep-based memory consolidation
N3 stage of sleep
slow wave sleep
- characterized by delta waves
REM (rapid-eye movement) stage
dreaming occurs
- brain is active but body is paralyzed
- Waking up during this phase prevents memory formation of the dream
- Inc. activity in prefrontal cortex (resp for logic)
Circadian rhythms
cycle of sleep and awakeness
- Based upon melatonin released by the pineal gland
- Daylight is a queue
Dreaming theories
1. Freud
2. Evolutionary biologist
3. Other
- Freud thought that it was the unconscious desires wanting to be interpreted
- Biologist assumes that it’s about threat simulation so that we’re ready for the real world
- Some support that it helps maintain brain flexibility
- Helps to consolidate thoughts to long-term memory
Activation synthesis hypothesis (dreaming)
brain gets lots of neural inputs while sleeping into the prefrontal cortex
- Brain tries to make sense of the random brain activity and dreams are that
Problems coming from sleep deprivation
- Obesity (body makes more cortisol, stim hunger)
- Depression
Sleep debt
sleeping after skipping it can put us on the right track for healthy sleep habits
insomnia vs narcolepsy
insomnia: can’t fall asleep
narcolepsy: can’t stay awake
Sleep apnea
Happens when we sleep and get reduced airflow into the body
- We literally asphyxiate since we’re not getting enough O2 and we wake up briefly
Hypnotism
Get person to relax and focus on breathing
- Makes them more suggestible in that state
Dissociation theory (hypnotism)
hypnotism is extreme form of divided consciousness
Social influence theory
people do and report what’s expected of them
Depressants
lower the body’s basic f(x)s
Ex.) heart rate, rxn time, etc
Barbiturates
used to induce sleep and reduce anxiety
- Depress CNS
Benzodiazepines
Sleep aid and anti-anxiety medication
- Super common
- Enhances brain’s response to GABA which opens Cl- channels making neurons more -q’ed
When GABA is active, we are able to relax
Opiates
used to treat pain and anxiety
- Act upon the body’s endorphin receptors
Caffeine
Inhibit AMP receptors and disrupts sleep
Nicotine
disrupts sleep and reduces appetite
- @ high levels it can cause muscle relaxation and stress reduction
- Physiologically addicting
Cocaine
stimulant
- causes unnatural influx of dopamine, serotonin and norep.
- Depletion of these chemicals results in withdrawal sx’s
Amphetamines
trigger the release of dopamine
- highly addictive
Ecstacy
Both a stimulant and hallucinogen
- Inc. dopamine and serotonin
- Stim. CNS but can damage neurons by doing that
LSD
interferes with serotonin which causes visual hallucinations
Marijuana
THC inc. sensitivity to sounds, tastes, smells
- impairs locomotion and coordination
- Disrupts memory formation and short-term recall
Homeostasis and drug dependence
When you take a drug and build habits before taking it, your body adapts to make sure it gets to baseline by the time you consume it
- Ex.) when you smell coffee when making it, you become lower in energy b/c your body is anticipating caffeine
How are dopamine and serotonin related?
Reciprocally regulated
Tolerance
Getting used to stimulus
- Ex.) needing more drug to get same effect
Methandone
Helps to detox opiate addicts
- Activates opiate receptors but slowly, so as to dampen the high
- Reduces withdrawal and cravings and the high from using opiates (receptors are in use)
Cognitive behavioral therapy
Addresses both cognitive and behavioral components of addiction
- By recognizing bad situations, you are able to respond better, especially w/ coping strategies
Motivational interviewing (withdrawal)
working with pt to find intrinsic motivation to ∆
Relapse
Pt goes back into addictive behaviors
Divided attention
focusing on multiple things @ once which often leads to switching b/w them when it comes to tasks
Selective attention
When we process stimuli selectively as they come in
Exogenous cues
Sensory stimuli that require no effort to notice
- Ex.) bright colors, loud noises
Endogenous cues
require understanding to know that it’s a stimulus
- Ex.) Arrow —›
Cocktail party effect
Brain is able to take in multiple stimuli but focuses auditory attention on 1 particular stimulus
Inattentional blindness
when we focus attention at a point, we are unaware of other things not in our visual field
Change blindness
don’t notice changes
Broadbent early selection theory (a theory of selective attention)
- Info enters our brain (words),
- unnecessary info gets sorted out (accents),
- important info get recognized (who said something and what those words mean)
Deutch & Deutch late selection theory (a theory of selective attention)
Info is filtered AS IT ENTERS our brain, then important info gets passed to conscious awareness (Brita filter)
- This filter determines what is important enough to pass onto the brain
Treisman’s attenuation theory (a theory of selective attention)
When info enters our brain, it doesn’t get filtered out completely but “attenuated” (shitty filter)
- Everything enters our consciousness, but less important things aren’t assigned high priority
Priming
Exposure to 1 stim affects response to another stim
- Happens even when we weren’t paying attention to the 2nd stim
- previous exp influences our current interpretation of new events
Resource model of attention
attention is a limited resource
Multitasking/divided attention is affect by 3 factors
- Task similarity: if tasks are similar, then they are easy to do together
- Task difficulty: harder tasks require more focus
- Practice: if we know what we’re doing, then it’s easier to do mindlessly
Information processing model
Brain is like computer
- Input information (sensory), process it, output decisions
Iconic memory
what we remember what we see (0.5 sec)
Echoic memory
what we remember about what we hear (3-4 sec)
Working memory
Another name for short term memory/what you’re thinking about in the moment
Phonological loop (working memory)
temporarily holds verbal information
- same thing as echoic memory
Central executive
Controls and processes working memory
Episodic buffer (working memory)
stores visual and auditory info
- records whole “episodes”
Visuo-spatial sketchpad (working memory)
how we hold spatial + visual info
- Ex.) remember how to do specific Judo moves
dual coding hypothesis
easier to remember words when they’re associated w/ images
long-term memory
Storage of information for extended period of time
- capacity is limited
Explicit memory (long-term)
facts/events that we can clearly describe
- semantic or episodic
Semantic memory
ability to recall words, concepts, #’s
- knowing vocab
Episodic memory
memories related to events
Implicit memory
memory that cannot be described but is just known
- Ex.) Speaking our native language
Procedural memory
memory of how to do things (riding a bike)
5 ways to encode info
- Rote reversal: do the same thing over and over again
- chunking: group things together (categorize)
- mnemonic devices
- Self-referencing: think how info relates to you personally
- spacing: spreading studying to shorter periods
habituation vs dishabituation
habituation: getting used to a stimulus
dishabituation: when you’re already used to a stimulus (tuning it out or sth) and something happens that makes youo notice it again
- Ex.) you ostart tuning out the neighbor’s music but then someone slams the door and you focus on that. Then b/c your hearing is peaked, you notice the music again
State-dependent memory
memory that depends on the state you processed it
- If you learn something drunk, you’ll remember the next time you’re drunk
- If you’re happy seeing an ad, next time you’re happy you think of the ad
Free recall vs cued recall
free: able to recall w/o cues
cued: need help w/ info retrieval
- need to hear “pl” to remember planet
Distal vs proximal stimuli
distal: the actual stimulus itself
proximal: stimulus “proximal” to our receptors
- In this sense, the stimulus has been made “close” to us, such as light getting its image put into our retina
Source monitoring error
memory error where source of the memory is wrongly attributed to another exp
- angry w/ someone but forgot it happened in a dream
Source monitoring error
memory error where source of the memory is wrongly attributed to another exp
- angry w/ someone but forgot it happened in a dream
flashbulb memories
highly vivid memories
- Still able to be reconstructed
Long-term potentiation
No new brain cells, memories form b/c connections b/w neurons get stronger
RETROACTIVE INTERFERENCE
new learning impairs old info recall
- issues thinking in retrospect
PROACTIVE INTERFERENCE
past impairs future learning
- Issues thinking about the future
What memories stay stable as you age?
implicit memory, recognition
What memories improve as you age?
semantic memory (verbal skills), crystalized IQ (ability to use knowledge), emotional reasoning
What memories get worse as you age?
Recall, episodic memory (difficult to make new memories), processing speed, divided attention
- Prospective memory (remembering to do things in the future)
Alzheimer’s disease
Forgetting so much that it interferes w/ normal life
- caused by excessive neuronal death
- buildup of amyloid plaque in the brain
- Sx’s include memory loss, attention, planning, semantic memory, abstract thinking
Korakoff syndrome
Damage to certain areas causes poor balance, abnormal eye movements, confusion and memory loss
- lack of vitamin B1 due to malnutrition
- If found early it can be treated w/ proper diet and cognitive therapy
RETROGRADE AMNESIA
inability to remember things from the past
ANTERGOGRADE ANMESIA
inability to remember new things
Piaget theory of cognitive development
Children aren’t mini adults, but actively construct their view of the world
Piaget stages of development
Sensorimotor stage
- babies develop smell, hearing, touch and become active
- 0-2 years old
- children develop object permamence
Preoperational stage
- 2-7 years old
- no empathy, but begin to oengage in pretend play
Concrete operational stage
- 7-12 years ld
- kids learn empathy and pass the water conservation test
Formal operational stage
- 12+
- learn to do abstract moral reasoning and abstract consequences
Trial + error
poor means of problem solving but will work with enough time
Algorithm problem solving
logical prodecure of trying solutions until one works
Heuristics (problem solving)
mental shortcut to find solution
- Means end analysis: analyze problems and break it down to smaller problems
- Working backwards: start w/ goal and connect back to current
Intuition (problem solving)
Relying on instinct to solve problem
- Fixation: getting stuck on wrong approach
- Fixationc an cause the “aha” moment
Type I error
false positive
Ex.) + pregnancy test when you’re not pregnant
Type II error
false negative
Ex.) you’re actually pregnant even though test says no
Availability heuristic
using examples that come to mind (available) to solve a problem
Representativeness heuristic
estimating the likelihood of sth happening based on our previous experiences w/ it
- Leads to the conjunction fallacy: if youo see the excepiton to the rule, you assume that it can happen for you
- think: “something like this happened to me before”
Biases that prevent correct decision making (3)
- Overconfidence
- belief perseverance: ignore disconcerning facts
- confirmaiton bias: seek out confirming facts
Framing effect
How you frame a situaiton affects what answer people will choose
Semantic networks
concepts are organized in the mind in terms of connected ideas
- Similar to how they’re stored in computers
- kinda like a schema
Spreading activation
When we think abooutt 1 concept, we think of all concepts related to it
- Allows for false memories, since we remember wrong info that is related
Spearman general intelligence theory
People who score well on 1 test tend tot score well on subsequent assessments
- People have a g factor that describes their overall smartness
3 intelligences theory
- analytical (academic)
- creative (generatte new ideas)
- practical (problem-solving)
Fluid vs crystallized intelligence
- Fluid: ability to reason quickly and abstractly
- Crystallized: accumulated knowledge and verbal skills
Identical twins vs fraternal twins
Identical: come from the same zygote (hence why theyre almost exactly the same genetically)
Fraternal: 2 ovum were a part of a single menstural cycle that were both implanted by diff sperm
- Results in genetic differences
Fixed vs growth mindset
Fixed: intelligence is biologically set and un∆ing
Growth: intelligence is ∆able as you learn more
Gardner’s 8 intelligences
- Spatial: visualizing the world in 3D
- Naturalist: understanding living things and nature
- Musical: discernign pitch, timbre, etc
- Bodily/kinesthetic: coordinating body w/ mind
- Linguistic: finding the right words to express what you mean
- intra-personal: understanding youself and what you want
- interpersonal: sensing people’s feelings and emotions
- mathematical: quantifying things and proving hypotheses
I Love Beer So Much, a Liter Is Nothing
Behaviorist theory of language & cognition
language is condittioned behavior
Nativist (Chomsky) theory of languange & cognition
language is innate
- Children are born w/ mechanisms for learning language
- There is a critical period from 0-9 that children are most apt to learn a language
Materialist theory of language & cognition
look @ what happens in the brain when people think/speak/write
Interactionist (Vygotsky) theory of language & cognition
Interplay b/w env. cues and biology
- bio and social factors interact in order for kids to learn language
- The fact that kids want to interact with adults makes them want to learn language
Universalist theory of language & cognition
Thought determines language completely
Piaget theory of language & cognition
children think in certain ways and develop ways to describe these thoughts
Weak linguistic determinism
language influences thought (not a super huge effect)
- Ex) reading left —› right is how we imagine girl pushing boy
Strong linguistic determinism
Our language determines our whole cognitive processes
- Our language determines how we exp the world
Skinner learning theory (behaviorist approach)
Language is a form of behavior and is learned through operant conditioning
- kids only acquire language through reinforcement
language processing occurs in the ____ hemisphere
left
Broca’s area
Resp for speech pdn
- Damage means we’re able to understand language but unable to communicate
- Found in frontal lobe
Broca = Production