midterm 2 Flashcards
___ is related to consciousness but its a seperate phenomenon.
Attention
___ is the gate keeper of consciousness. It selects and enhances relevant info and ignores irrelevant/uninformative info
Attention
Isolation Aphasia
what is it?
what does it result from?
brain disorder related to conscious processing resulting from brain trauma
that isolates speech mechanism form other parts of brain (broca’s and wernicke’s area)
Isolation Aphasia
symptoms
intact speech production mechanism and connections with auditory cortex
- can repeat speech but no evidence of conscious behavior (no comprehension)
- no indication of awareness of their environment
Blindsight
what is it?
brain disorder related to conscious processing resulting from brain trauma
( damage to primary visual cortex)
Blindsight - the ability to?
utilize visual information despite a complete lack of awareness of seeing
Split Brain
results when?
results when corpus callosum connecting the two hemispheres of the brain is severed
(2 hemispheres isolated)
(usually as treatment for severe epilepsy)
Split Brain studies
patients tested for separate abilities of left and right hemispheres using visual and manual tasks
(left hand -> RH - unable to name and describe objects)
Hypnosis
systematic procedure involving deep relaxation which tends to promote a heightened state of suggestibility
What % of pop’n is highly hypnotizable?
10%
Hypnosis weakly related to capacity to?
suspend reality and become involved in imaginative activities
Observed effects under hypnosis (4)
1) anesthesia
2) sensory distortions and hallucinations
3) disinhibition
4) posthypnotic suggestions and amnesia
2 Theories of Consciousness
1) social role playing
2) altered state of consciousness
social role-playing OF HYPNOSIS
people act out the role of a hypnotic subject and behave accordingly (bias effect, conformity, suspension of self-control)
(behave as they are expected to)
Evidence of Theory of Social Role Playing (3)
(1) -no change in pattern of EEG activity
(2) -non-hypnotized subjects can be induced to perfom same behaviours
(3) - recovery of memory very unreliable
Evidence of Theory of Altered State of Consciousness (3)
1) effects of anesthesia
2) dissociation
3) divided consciousness common under normal conditions
Dissociation
a splitting off of mental processes into two separate, simultaneous streams of awareness
Different ___ ___ related to characteristic stages of activity
EEG patterns
EEG patterns for: AWAKE
beta
high frequency
low amplitude
EEG patterns for: RELAXED
alpha
medium frequency
medium amplitude
EEG patterns for: LIGHT SLEEP
STAGE 1 & 2
theta
low frequency
medium amplitude
EEG patterns for: DEEP SLEEP
STAGE 3 & 4
delta
low frequency
high amplitude
EEG patterns for: AWAKE and ALERT
HIGH frequency, LOW amplitude
EEG patterns for: DEEP SLEEP
LOW frequency, HIGH amplitude
REM sleep
RAPID EYE MOVEMENT
- dreaming
Sleep acts to ?
(2) other purposes
reduce stimulation of brain
- restorative (protein synthesis)
integrate new with old
Sleep cycle controlled by?
BRAC - basic rest-activity cycle
controlled by hindbrain
Consciousness
subjective experience of world, our bodies and our mental perspectives
increased ____ in the brain occurs during REM sleep when most ___ appears to occur
stimulation
dreaming
Purpose of dreams - 2 aspects
physiological
psychological
Physiological purpose of dreams
pons sends activation to the cerebrum
interpreter attempts to create meaning from random activation of different areas of the brain
(content of dreams meaningless)
Psychological purpose of dreams
expression of unconscious activities, inner conflicts, and desires
(We can analyze dreams as window to unconscious)
Purpose of dreams: Both Physiological and Psychological?
pons sends activation, but previously activated experiences still remain most highly activated and interpreter utilizes this information
insomnia:
trouble falling asleep, waking too early, waking up in middle of night and having trouble falling back asleep
REM sleep behaviour disorder
absence of paralysis while dreaming
narcolepsy:
direct REM-like onset with paralysis,
can be associated with emotional states
sleepwalking (somnambulism):
slow-wave sleep
- walking while fully asleep
enuresis (bed-wetting)
stage 3 sleep
involuntary urination while asleep after the age at which bladder control usually occurs
night terrors
stage 4 awakening
- sudden, partial arousal associated with emotional outbursts, fear, and motor activity
learning:
a relatively durable change in behaviour or knowledge that is due to experience
- CHANGE in organisms behaviour or thought as a result of experience
habituation:
tendency to discontinue responding to repeatedly occurring uninformative events
- process of responding less strongly over time to repeated stimuli
Classical conditioning
form of learning:
a previously neutral stimulus acquires the capacity to evoke a response that was originally evoked by another stimulus by pairing it with this stimulus
Classical conditioning also known as
Respondent/Pavlovian
stimulus-stimulus learning (association b/w 2 stimuli)
In Classical Conditioning - previously unimportant stimuli takes on?
symbolic value
NS -> CS
Classical conditioning - Stage 1
UCS -> UCR
NS -> no effect
Classical conditioning - Stage 2
NS paired closely in time with UCS that elicits an automatic/ reflexive response: UCR
Classical conditioning - Stage 3
CS (previous NS) elicits CR as a result of assocation with an UCS
UCS
upon presentation evokes response called UCR
NS
initially evokes no response when presented alone
paired continuously with UCS
Eventually NS becomes?
CS once it produces a CR
Forward, delayed conditioning
NS onset before UCS onset (0.5 seconds)
most efficient conditioning
conditioning is said to occur when …
CR appears before UCS onset
3 phases of Classical Conditioning
acquisition
extinction
spontaneous recovery
Acquisition
gradually learn/acquire CR
as CS + UCS are paired over and over again, CR increases progressively
Extinction
(when UCS no longer follows CS, strength of CR decreases to zero)
CS alone and CR declines
Spontaneous Recovery
CR reappears are period of delay even when UCS is still not presented
- less intense, return to baseline faster
Stimulus Generalization
process by which CS similar but no identical to original CS elicit CR
Stimulus Discrimination
process by which organisms display less pronounced CR to CS that differ from original CS
Generalization Gradient
stimuli closer to the CS produce a higher probability of a CR
Conditioned emotional responses
emotional response that results from classical conditioning and VERY resistant to extinction
usually from association with NS with painful/fearful experience
Fetish
an example of?
unusual sexual attachment to objects
Conditioned emotional response
Conditioned fear Response
example
phobias - unreasonable fear of objects or situations
(classical conditioning
Operant Conditioning
learning controlled by consequences of organisms behavior
Law of Effect
if a response in the presence of a stimulus leads to satisfying effects, the association between the stimulus and response is strengthened
Operant Conditioning
3-term contingency:
1) discriminative stimulus: sets the occasion for a response
2) operant behaviour: response
3) consequence: contingency of behaviour
Operant Conditioning
What determines behavior?
consequences of S-R relationships
reinforcement occurs when
an event following a response INCREASES an organism’s tendency to make the same response in the presence of the stimulus in the future
punishment occurs when
an event following a response DECREASES an organism’s tendency to make the same response in the presence of the stimulus in the future
positive reinforcement:
discriminative stimulus increases frequency of behaviour:
presentation of appetitive (+) stimulus or + stimulus
negative reinforcement:
discriminative stimulus increases frequency of behaviour:
removal of an aversive(-) stimulus or - reinforcer (consequence)
positive punishment:
discriminative stimulus decreases frequency of behaviour:
presentation of an aversive stimulus or punisher (consequence)
negative punishment or response cost:
discriminative stimulus decreases frequency of behaviour:
removal of an appetitive stimulus
Frequency of behaviour
1) reinforcement
2) punishment
1) increase
2) decrease
how is behaviour influenced?
1) reinforcement
a) +
b) -
2) punishment
a) +
b) -
1. a) + stimulus presented b) - stimulus removed 2. a) - stimulus presented b) + stimulus removed
shaping (acquisition)
the reinforcement of closer and closer approximations of a desired response
(conditioning target behavior by progressively reinforcing behaviors that come closer and closer to target)
extinction
behaviour decreases because the reinforcer or behavioural contingency is removed
resistance to extinction occurs when ?
responses persist without reinforcement
generalization and discrimination occur with respect to the?
discriminative stimulus
primary reinforcers and punishers:
item or outcome that naturally increases target behavior biological needs (food, pain, fear)
conditioned reinforcers and punishers: (secondary)
become associated with primary needs (money, flashing light of police car)
- mechanism of association is CLASSICAL conditioning
(neutral object that becomes associated with primary reinforcer)
Schedules of Reinforcement
- Continuous
reinforce behavior every time it occurs
Schedules of Reinforcement
- Intermittent
reinforce responses only some of the time
(2) types of INTERMITTENT reinforcement
Interval
Ratio
INTERMITTENT reinforcement
1) Interval
2) Ratio
1) reinforcement based on intervals of time
2) reinforcement provided after a certain # of responses
fixed ratio:
pattern in which we provide reinforcement after a fixed number of non-reinforced trials (FR-10, after every 10 responses, FR-1 is continuous)
variable ratio:
pattern in which we provide reinforcement after unpredictable # of responses but on average occurs after some number of non-reinforced trials (VR-10, on average reinforcement once every 10 trials)