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MUSIC COGNITION TERMS
music cognition terms
249
Psychology
Undergraduate 2
04/22/2008

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Term
music
Definition
organized sound.
Term
musical babbling
Definition
period that babies undergo.
Term
pitch  
Definition
that whihc carries melody. that which allows us to order tones from low to high.
Term
transposition
Definition
when you make a series of notes higher but still hear the same song
Term
octave
Definition

when you hear two tones with a frequency ratio of 2:1 or 1:2.

 

or

 

a collection of pitches.  

Term
chord  
Definition
three or more notes typically played simultaneously; is the basis of harmony
Term
arpeggio
Definition
when three notes of a chord are introduced, and then played as a chord
Term
scale
Definition
a selection of notes, typically 5-12 that constitute the subset of possible pitches we use for constructing melodies
Term
 chromatic scale
Definition
the 12 notes in Western musical system
Term
tempo
Definition
the speed or pace of a peice of music.
Term
timbre/tonal colour
Definition

characteristics that define where a sound is coming from;

 

that which distinguishes two instruments playing the same note.

Term
harmony
Definition
a counterpoint, or a parallel melody
Term
chord progression
Definition
two instrumentalists can play the same thing, or play different things in unison or in harmony
Term
reverberation
Definition
the reflections caused by sound waves bounding off the surfaces in enclosed acoustic spaces
Term
polyphony
Definition
more than one musical part playing at one time
Term
tritone
Definition
distance between C and F-sharg; considered so dissonant in the past that it was associated with the Devil
Term
basic elements of sound (8)
Definition

1. LOUDNESS

2. PITCH

3. CONTOUR

4. DURATION

5. TEMPO

6. TIMBRE

7. SPATIAL LOCATION

8. REVERBERATION 

Term
PITCH
Definition
the actual frequency of a particular tone to its relative position in the musical scale
Term
20-20, 000 Hz
Definition
the human ear can only hear ___ range of sounds (Hz)
Term
low pitch
Definition
caused by slow frequencies
Term
high pitch
Definition
fast frequencies cause this
Term
note
Definition
what you see written on a musical score
Term
tone
Definition
what you hear (as opposed to what is written on a musical score)
Term
rhythm
Definition
the duration of a series of notes and the way that they group together.
Term
tempo
Definition
the speed or pace of a musical composition
Term
loudness
Definition

the amplitude of a tone; volume control

(measured in dB)

Term
distance; loudness
Definition
_____ that the string covers with each oscillation back and forth is translated by our brains into ____
Term
rate; pitch
Definition
_____ at which the string oscillates is _____
Term
size
Definition
rate of an oscillation is determined by the _____ of the string
Term
waltz meter
Definition
tones organized into groups of three.
Term
march meter
Definition
tones organized into groups of two ro four
Term
key
Definition
hierarchy (created in our minds) of importance that exists between tones in a musical piece
Term
modulation
Definition
key change during the course of a song
Term
melody
Definition
the main theme of a musical piece. the pattern or relation of successive pitches across time
Term
harmony
Definition
the relationship between pitches of different tones ; ca refer to a chord progression
Term
interval
Definition
distance between two ntoes
Term
whole step
Definition
intervallic distance between A and B or Do and Re
Term
semi-tone
Definition
a half step or 1/12 of an octave ; going sharp or flat
Term
scale
Definition
a subset of pitches, varying in size depending on culture
Term
major scale
Definition
the most common of 7 tones in Western musical system
Term
tonic/first degree
Definition
starting pitch
Term
minor scale
Definition
progression from whole note to half note to whole note to half note, etc.
Term
pentatonic scale
Definition
minor scale using 5 notes (blues)
Term
fundamental frequency : overtones
Definition
the tone with the slowest vibration rate, with the lowest in ptich, is referred to as the_____; the rest of the tones are called _____.
Term
overtone series
Definition
the pattern of energy at different frequencies
Term
partials/inharmonic overtones
Definition
overtones that are not clearly integer multiples of a fundamental are called _____.
Term
restoration of the missing fundamental
Definition
if we encounter a sound that has all of the components except the fundamental, teh brain fills it in for us.
Term
attach
Definition
the very first part of a musical instrument sound
Term
flux
Definition
the way sound changes after it has started playing
Term
triplet
Definition
group of three equal-valued notes played in the time of two
Term
beats
Definition
temp is measured in _____.
Term
waltz beat
Definition
beat where the strong beat occurs every three beats (strong-weak-weak)
Term
whole note
Definition
last 4 beats
Term
half note
Definition
lasts 2 beats
Term
quarter note
Definition
lasts 1 beat
Term
eighth note
Definition
lasts half a beat
Term
syncopation
Definition
when a note anticipates a beat that is, when a note is palyed a bit earlier than the strict beat
Term
pick-up
Definition
note played earlier, or the note succeeding into the main piece is called _____
Term
backbeat
Definition
to accent the 2nd and 4th beats in 4/4 time.
Term
consonant
Definition
pleasing sounding chords and intervals
Term
dissonant
Definition
unpleasing sounding chords and intervals
Term
melodic transposition
Definition
singing or playing a song in a different key or with different pitches
Term
unconscious inference
Definition
Helmholtz's idea that unconscious processing of our sensory information plays a role in inferring what is being perceived
Term
liklihood principle
Definition
used by our brains; assumption that a single object produces harmonic components
Term
unconscious inference
Definition
Helmholtz's idea that unconscious processing of our sensory info plays a orle in inferring what is being perceived
Term
liklihood principle
Definition
our brains assume that it must be a single object producing these harmonic components
Term
octave equivalence
Definition

infants and adults have this.

being able to distinguish easliy between a pair of tones an octave apart and a pair of tones not quite an octave apart 

Term
pitch consistency
Definition

adults and infants have this.

tones with different harmonic structure have the same pitch as long as their fundamental frequencies are the same. 

Term
melodic contour
Definition
is determined by the direction of movement for a set of musical notes. whether notes move higher/lower and if teh notes repeat/skip/move stepwise are all factors of how the contour affect a melody
Term
one feature that distinguished singing from speech and is characteristic of adult musical organization
Definition
the two-level organization of beat and within-phrase rhythm
Term
absolute pitch
Definition
ability to identify pitches by their note names even in the ABSENCE of music context
Term
early learning hypothesis
Definition
aboslute pitch can be acquired by anyone, but only during a cirtical period ending at the age of 5 or 6
Term
residual absolute pitch
Definition
foudn in adults, it si the inability to identify pitches specifically yet APPROXIMATE the pitch levels of familiar songs (Levitin's study)
Term
the difference between the emotions  ____ & _____ doesn't fully occur until the age of ___.
Definition
anger and fear; age 8
Term
who created brain scanners?
Definition
EMI (hte producers of the beatles)
Term
multiple trace theory of memory
Definition
each time you experience something perceptually, it is traced down in memory. so when you experience an odd trace, your brain senses the mismatch immediately
Term
identification
Definition
can immeditaely identify many pieces of music without external aid
Term
discrimination
Definition
we can easily find a difference in two peices of music (based on timbre, pitch, etc.)
Term
categorization
Definition
we can distinguish between multiple genres  of music
Term
we can recognize that two different versions of a song are actually just two different versions and not something new..this is called:
Definition
abstraction
Term
"pleasure" centers of the brain
Definition

H: hypothalamus

V: ventral tegmented area

N: nucleas accumbens  

 

these regions modulate DOPAMINE (the feel good hormone); and are activated during pleasurable activities  

Term
Broadman Area 47
Definition

-in the PREFRONTAL cortex;

the PREDICTION center of our brain

-relevant to the question "could musical reward be related to prediction processes?) 

Term
tonotopy
Definition

the idea that in the auditory cortex, pitch is laid out. recall the tontopic homunculus.

-relevant to discussion of TIMBRE and timbre maps 

Term
mind
Definition
the part in each of us that  embodies our thoughts, hopes, esires, memories, beliefs and experiences, it is non-physical
Term
brain
Definition
a physical entity/organ in body. BRAIN ACTIVITY gives rise to the mind
Term
functionalism
Definition
similar minds can arise from quite different brains; brains are just the collection of wires and processing modules that instantiate thought
Term
frontal lobe
Definition
involved in presonaliyt, planning and self control
Term
temporal lobe
Definition
involved with hearing and memory
Term
posterior lobe
Definition
invovled with motor movements and spatial skill
Term
occipital lobe
Definition
associated with vision
Term
cerebellum
Definition
involved in emotions and the planning of movements
Term
lobotomy
Definition
the surgical separation of a portion of the FRONTAL lobe (the PREFRONTAL CORTEX) from the THALAMUS
Term
our brains work in "parallel"
Definition
meaning that many things can be worked on at once
Term
serial
Definition
computers work in serial; menaing things must we worked on one at a time
Term
air molecules striking the ear drum at different frequencies
Definition
sound
Term
top-down processing
Definition
information coming into the system (perceptually) can be influenced by what the individual already knows about the information that is comng into the system
Term
bottom-up processing
Definition
lower level systems categorize and describe incoming perceptual information and pass this descriptive information onto higher levels for more complex processing
Term
visual/auditory illusion
Definition
caused by top-down or bottom-up processing when incomplete or ambiguous information is interpreted wrongly
Term
perceptual completion
Definition
black triangle and outline make a star. brain makes a calculated guess of what is there, fills in missing info.
Term
stream segregation
Definition

an example of auditory illusion in music.

- melody pops out when the notes are close enough together in TIME -the perceptual system HOLDS the notes together. the melody is lost when the notes are TOO far apart in time  

Term
anticipation
Definition
when listening to music, we try to anticipate what is coming. we expect certain pitches, rhythms, timbers ect. to co-occur
Term
cadence
Definition
a chord sequence that sets up a clear expectaion and then closes,t ypically with a satisfying resolution
Term
deceptive cadence
Definition
composer repeats the chord sequence again and again until he convinces listeners that they're going to get what they expect, but then provides an unexpected chord at the end.
Term
schema
Definition

a mental representation or framework created from experience. it is used to guide a response

-the more aspects of the schema are fulfilled, teh closer the situation is to the ideal/represented schema  

Term
gap fills
Definition
a tpical melody includes a lot of stepwise motion, that is adjacent tones in the scale. if the melody makes a big leap, our brains expect that the leap was only temporary and we want tones to return to the jumping-off or starting point
Term
EEG
Definition

-electroencephalogram

-measures ELECTRICAL CURRENTS/BRAIN ACTIVITY of the brain.

-records firings of LARGE groups of neurons (not individual neurons)  

Term
fMRI
Definition

functional magnetic resonance imaging machine-uses the METALLIC PROPERTIES of HEMOGLOBIN to trace BLOOD FLOW in the brain.

-through this we can see which areas of the brain are activated when listening to music.  

Term
constructivist view of memory
Definition

our memory system stores info about the relations b/w objects and ideas, but not necessarily details about the object themselves

-theory ignores IRRELEVANT details, while preserving the "gist"  

Term
record-keeping view
Definition
-memory is like a tape-recorder which preserves all or most of our experiences accurately
Term
contralateral
Definition
many inputs and outputs of the brain are contralateral-LEFT brain controls movement in teh RIGHT half of the boyd. the right brain controls processes on the left side of the body (the right brain processes info that your left eye sees)
Term
Benjamin White
Definition
manipulated common songs and realized that in most cases, the deformed tune was recognized more often than chance could account for...most subject could recognize change in transposition almost immediately
Term
categorization (Wittgenstein)
Definition

-denounced idea that we can define a category

-category membership is determined by a family ressemblance , which relies on a list of features that may or may not be present (ex. we call something a game if it resembles other things we have previously called games) 

Term
Shepard
Definition

appearance-reality problems

1. objects though in presentation may be similar, are inherently different

2. object though in presentatino may be different are inherently identical

3. objects though different in presentation are of  the same natural kind  

Term
Rosh
Definition

-prototypes; the "best" category member

-category membership can be thought of as a question of degree , with some tokens being 'better' exemplars than others  

Term
exemplar theory
Definition

you can't find a prototype for a wide and broad category because the members vary ; ex. what's the prototype of a "tool"? (ambiguous); contextual info that prototype theory doesn't account for

-we form contextual categories not perceptual categories 

Term
hierarchical coding
Definition
our memory for music involves this. means that not all words are equally salient, and not all parts of a musical phrase hold equal status (ex. singing national anthem and stoping at "rockets red glare"...)
Term
music is involved with
Definition

-social, clinical, cognitive and developmental psych

-also neuroscince and genetics  

Term
by the age of ____ the auditory system of the human fetus is function
Definition
20 weeks
Term
serves as a filter; can alter the way soun appears
Definition
the pinna; outer physiology of the ear
Term
the inverted U preference curve
Definition

we prefer something in the middle, not the pole.

-if we have low pitch on one en and high pithc on the other, we prefer pitches that fall in between. as we deviate from the middle, our liking decreases

-this is the same for FAMILIARITY (usual) and NOVEL(unusual)  

Term
fundamental mathematical axiom
Definition

A=A

if someone likes a particular song, they should like all versions of that song. BUT this falls apart because one person may like an original but despise a remake 

Term
groove
Definition
-musical quality that moves the song forward, the musical equivalent to a book that you can't put down
Term
cerebellum
Definition

-crucial to understanding of music

-percieves TIMING

-it has been evolutaionary benefical to relate movement to emotional activities 

-has an important role in EMOTION 

Term
startle response
Definition
-response to auditory info. for survival purposes, there are MULTIPLE PATHWAYS to let us knowt that danger is apparent.
Term
habituation circuit
Definition

similar to a startle resonse and to the auditory system's sensitivity to change

-if your refrigerator has a hum, you get so used ot it that you no longer notice it

-since teh CEREBELLUM acts as a timekeeper, when it's damaged, HABITUTAION may disappear  

Term
William's Syndrome
Definition

caused during PRENATAL DEVELOPMENT when a chromosome is missing (similar to Down's).

individual with W.S. have defects in their cerebellum and are consquently unusually outgoing and pleasant.

Term
expert
Definition

someone who has reached a high degree of accomplishment relative to other people

-expertise is a social judgement

-10 000 hours of practice is required to achieve the level of mastery associationed with being an expert 

Term
chunking
Definition
the process of tying together units of information into groups and remembering the group as a whole rather than the individual pieces
Term
identification memory
Definition
the ability to identify pieces of music that we've heard before; similar to our memory for faces
Term
the brute-force approach
Definition
- we try to memorize certain information by repeating it over and over again.  but rote memorization is facilitated by a hierarchical organization -certain words, or notes are more important than others and we organize our learning around these words, or notes, etc.
Term
conditioned head-turning task
Definition
two speakers are present in front of the baby which plays music when baby looks at it, they then learn that they control the music.  babies prefered music they heard in the womb
Term
the mozart effect
Definition

talk shows claimed that listening to mozart 10 miutes a day makes you smarter.

-there is thought that music makes you smarter on SPATIAL ABILITY TASKS  

Term
infant-directed speech/motherese
Definition

-speaking to infants with a slower tempo, an extended PITCH RANGE and higher overall PITCH LEVEL

-infants notice a change in CONTOUR and thus udnerstand to some extent, what is being said 

Term
neuro-plasticity
Definition
ability of the brain to REORGANIZE itself. the amount of reorganiztion that can occur in most adults is vastly less than can occur in children and adolsecents.
Term
invertd U hypothesis
Definition

threshold in which song is too complex or too simple, and we dislike the song more readily after this point.

likability: y-axis

 complexity is on teh x-axis 

Term
Darwin
Definition
-idea that music developed through natural selection as part of human or paleohuman mating rituals
Term
Pinker
Definition

-proposed that once in a while we find a behaviour or attribute in an organism that lacks any clear evolutionary basis; this occures when evolutionar forices propagte an adaptation for a particular reson and soemthng else comes along with it.

-PINKER ARGUED THAT LANGUAGE IS AN ADAPTATION AND MUSIC IS ITS SPANDREL 

Term
(evoulutionary) spandrel
Definition

-Gould

-a by-product of an architects' design. birds evolved feathres to keep warm but then used them to fly

 

Term
evolutionary lag
Definition
time period/lag of 50 000 years between when an adaptatino first appears in a small proportion of individuals and when it becomes widely distributed in the population
Term
evolutionary perspective of music acquisition in humans
Definition
-music was acquired by mankind for the sake fo charming the opposite sex, because qualities that attract a mate are eventually encoded in the genome and passed on to future generations (Sexual selection)
Term
sexual selection
Definition
-selection which promotes traits that will increase an organism's success in mating. this is distinct from natural selection which acts simpy on traits which influence FECUNDITY (producing offspring) AND SURVIVAL
Term
mirror neurons
Definition

neurons that fire both when performing an action and when OBSERVING tohers performing that action.

-purpose is to train and prepare the organism to make movements it has not made before  

Term
formalist position (psycholinguistics)
Definition

formal devices/logic symbols possess an advantage over their natural counterparts (expressions such as "and" or "the") 

-any meaning in language which is not conveyed by the fromal devices yet is expressed in the natural counterparts is not acceptable and not intelligible  

Term
informalist position
Definition
language serves a purpose beyond scientific inquiry. because meaning can be conveyed without being in terms of formal devices, natural language must remain and while is can base itself on formal devices, it can also differ greatly from them at times.
Term
implicature
Definition
implicature: implying
Term
implicatum
Definition
what is implied
Term
Pribram's holographic theory of memory   
Definition

each beam of light from a hologram is needed to complete the image.

-memory is like a hologram

-every neuron in the brain contains every memory in the brain. a sufficient number of neurons must be activated to recall a memory  

Term
Rumelhart's parallel distributed processing account:
Definition
memory is distributed throughout the brain; it is not located in just one place
Term
charmichael, Hogan and Walters
Definition

noted label presented at time of encoding influenced recall

-subjects were lated asked to draw the stimulus figures based on recall. the info they were given during the initial time of exposure influenced the subjects' recall ability  

Term
Bower, Karlin and Dueck
Definition

created "droodles"

-when trying to recall figures, group2, whom recieved the DESCRIPTIVE words, were better at recalling the figures than group 1 

Term
repression
Definition
suppression of traumatic events
Term
Loftus
Definition

-eye-witness testimony

-suggestibility; HOW she asked the questions influenced the response  

Term
suggestibility
Definition
the way you ask the question influences a person's recollection of how often something happens
Term
recovered false memories
Definition
if you suggest something to someone in a question you can make them recall false memories
Term
primacy and recency effect
Definition

primacy: you remember the first word in a list of words; recency; you remember the last word in a list of words

-remember the PRIMACY effect has a greater effect than the recency effect on memory  

Term
schemas
Definition
are general representations of a common memory
Term
Brewer and Tyers
Definition

office study

-relevant to "schemas"

-people tended to remember seeing things that are NORAMLLY in offices, but which were not actually present in the study  

Term
chase & simon
Definition
found that chess payers have a schema for what a chess board looks liek so they can memorize it very quickly
Term
Nickerson & Adams
Definition

penny study

-found that students were unable to detect slightly abnormal pennies; the details are not mandaotry for memorizing a penn  

Term
Pitchert and Anderson
Definition

-homeowners and burglars

-memory of event depended on which perspective they took

-CONTEXT EFFECTS IN MEMORY/CODING 

Term
spreading activiation model
Definition
when you remember one thing, it triggers a flood in memories that are similar to that
Term
evidence for constructivist theory
Definition

1. posner and keele

2. loftus

3. gist memory

4. Nickerson & Adams  

Term
evidence for record-keeping account of memory
Definition

-1. flashbulb memories ; accurate memories of large scale events

2. penfield (been debunked)

3. Magnussen: discovered that eople are just as good at detecting a difference in two pictures back to back as they are if they see them a week apart  

Term
multiple trace model
Definition

-Hintzman

-everything you experience lays down a TRACE in memory. one trace isn't enough to remember a small detail, but if you experience the same detail enough, then you'll ahve enough traces in memory to remember it fairly accurately  

Term
what is the point of making decisions?
Definition
-to try to predict the outcome
Term
cognitive illusion
Definition
we think we understand teh nature of a probem, but our answers to the question reveal that we are living an illusion
Term
the dollar auction game
Definition

1. i could win some money

2. i need to limit my losses

3. i need to save face and punish my opponent

 

GENDER OF OPPONENT

1. man vs. man; out-compete

2. woman vs woman: limit losses, one will stop early

3.  man vs. woman; man will let woman win

Term
uncertainty in decision-making
Definition

regarding:

1. outcome

2. quality of info

2. quantity of info

note: there is also a level of REGRET regarding social comparison and saving face 

Term
Bernouli (1700-1782)
Definition
-tried to develop equations which could clarify decision making processes
Term
Kahneman and tversky
Definition
came up with present day beliefs regarding d-making
Term
belief perseverence
Definition
despite being told this information, the subject would pick the picture they looked at when teh arousal meter went nuts
Term
one-sided evidence bias
Definition
having heard the info of one side of the story, its difficult to imagine the other side
Term
Ross and Nisbett
Definition

-restaurant example of one-sided evidence of what your experience in a certain place is 

Term
sampling bias
Definition
-those individuals most profitable or beneficial are unintentionally chosen to represent a sample
Term
unscrupulous stockbroker
Definition
-example of a sampling bias-the subjects aren't seeing the whole picture
Term
order effects
Definition
survey are very sensitive to the order of questions
Term
anchoring and adjustment
Definition

-regarding d-making

-we tend to base estimates and decisions on known anchors or familiar, suggested positions and ADJUST RELATIVE to this point (note: if an arbitrary number is present, people will use this number as an anchor to make their judgements)  

Term
insufficient adjustment
Definition
a number on a roulette wheel will influence/serve as an anchor to the unrelated question posed
Term
pseudo opinions
Definition
-30% of the people have an opinon about something they don't know anything about
Term
fundamental attribution error
Definition

we tend not to give enough credit to the power of the SITUATION people are in when tyring to explain their behaviour (accredit it to their internal personality traits )

-we attribute attitudes to a BEHAVIOUR factor OR

-we attribute people's attitudes to a situational factor

 

Term
Ross: quiz bowl study
Definition

-related to fundamental attribution error ; study designed to make host look smart, contestant foolish

results:

-observers rated questioner in the 80th percentile of feneral knowledge, but the contestand below average (ess than 50%)  

-contestant rated questioner in teh 70th perceptil and himself in teh 40th because he believed audience knew the answers better than he

note: questioners role reveals NO ignorance  

Term
Humphreay; bosses and workers study
Definition
-workers deemed teh bosses as more knowledgeable while bosses viewed thier workers less knowledgeable
Term
Darley and Latane
Definition
students asked to present an essay based on "due unto others". group 1 told to hurry, group 2 told to take their time. those in group 2 would help the conferderate posed as a homless person (POWER OF THE SITUATION AFFECTS BEHAVIOUR)
Term
stepwise regression
Definition

-related to d-making

-additional variables added to the equation as long as they add something to its overall predictive quality or explanatory power

ex. we assess which factors are important or not in determining our total understanding  

Term
clinical judgment
Definition

analysis invovles making a decision on the bases of a set of cues or attributes

-ex. radiologists sorts x-rays into benign or malignant  

Term
configurale judgment
Definition

-the diagnostic meaning of one cue depends upon the meaning of other cues

ex. the tone of voice makes me think not suicidal unless the call comes in teh early hours of the morning  

Term
hindsight
Definition

-perception of the nature of an event after it has happened (people exaggerate in hindisght what they new in forestight; hindsight bias)

-they view things as "Relatively inevitable"

-believe others should have been able to better-predict outcomes than was actually the case/possible  

Term
creeping determinism
Definition
-tendency to report certain outcomes as relatively inevitable
Term
philosophical determinism
Definition
the conscious belief whatever happens has to happen
Term
formal modelling
Definition

-stepwise regression

-clinical judgment

-configurale judgment  

Term
looking at all?
Definition
-even in randomly produced data, people try to find some order of meaning
Term
gambler fallacy
Definition
-flipping a coin; the gambler fails to realize that after 4 successive heads, the fifth outcome is just as likely to be a heads
Term
Poisson distribution
Definition

-a statistical procedure used to describe the occurence of unlikely events in a large number of independent trials

-experts see "randomness," threatened individuals see "imagined order"

Term
overfitting theory
Definition

-given a set of events and a sufficiently large set of possible explanatory factors, one can always derive explanations to any desired degree

-overfitting theory is teid to a type of correlational overkill bias 

Term
hindsight bias
Definition
ability to ignore information that we have, even when we know it's inaccurate
Term
probability
Definition
-can be analytical, empirical and subjective
Term
analytical probability
Definition
a calculation based on our knowledge of the world and a logical evaluation  (cards, coins, roulette wheel, russian roulette)
Term
empirical probability
Definition
-we can simply count how often various events happen  (either actually or thorugh a simulation)
Term
subjective probability
Definition

-a subjective statement usually a prediction that is NOT the product of an experiment (ex. think it'll rain, so you pack an umbrella),

"it is LIKELY that she's an engineer, it is LIKELY that my VCR will break)  

-to speak about the probability of a non-repeatable event doesn't make much sense. what we're really doing is making a statement of confidence in our prediction  

Term
expected value (EV)
Definition

-it is the probability of the event times the outcomes, summed across all outcomes

-we assume the "game" can be repeated as many times as we like

-in a bet: is the amount of money you stand to win (in the long run)  

Term
conjunction
Definition

conjunction of two probabilities must be LESS THAN OR EQUAL to the SMALLER of the two properties

-the probability of a conjunction can bever be greater than the probability of one of its component events 

Term
kahneman & tversky
Definition

created a study in which subjects had to consider an office that has 70% engineers and 30% lawyers

-base rate gives the answer of 70% 

Term
3 heuristics of decision-making
Definition

1. representativeness

2. availability

3. adjustment from an anchor  

Term
representativeness heuristic
Definition

probabilites are evaluated by the degree to which A resembles B.

-when A is highly rep. of B, the probability that A ORIGINATES from B is high.

PROBLEM: similarity is often identified in teh exact same way as "probability". similarity is NOT influenced by factors that should influence probability  

Term
expert
Definition
someone who has achieved a level of exceptional skill or mastery in a domain that we value. as such it is a CULTURAL judgment
Term
declarative knowledge
Definition
the BIG problem in expertise is that experts don't know how they do what they do
Term
difference in kind
Definition
suggest that there is something completely different about these people (experts)
Term
difference of degree
Definition
suggests that there isn't anything inherently different, they just have more of the stuff than others (novices/layman) do.
Term
components of expertise (5)
Definition

1. memory (for paritcular domain of interest)

4. physical configuration (ex. oscar peterson had huge hands which helped him excel at piano, or height is a predisposition to bball; pysical config. can help but not guarantee success

3. attention: to the domain for long enough time

4. will power and belief in self (believe that practice will pay off to their performance)

5. multiple failures (people at top of field have more failures than those at bottom; failure percieved as a lesson)  

Term
chase & ericcson
Definition

-relevant to "transfer of skill" in the topic of "Expertise"

-did a study on skill transfer regarding a mnemonist

-couldn't remember letters but could remember 81 random digits

-therefore skill transfer is minimal if not non-existent  

Term
Carraher
Definition

brazilian children can sell 5 lemons at 35 c each, yet in the classroom they are unable to determine that 5 x 35 is?  no skill transfer

-learning curve is minimal if an expert transfers to a similar domain  

Term
Kolar's study of reading
Definition

-tested acquisition of reading skills ; subjects presented with upside down, mirror, reversed image sentences

-through practice we can read these different sentences almost as readily and as quickly as normal test (power law reading) 

Term
retention of skill
Definition

-relevant to "expertise"

-Koler's study of reading

-subjects came back a year later. started off shaky, but after some practice, performed better than they did a year before  

Term
retrieval speed
Definition
is a function of where things are in a sequence. it's easy to recall things at the end of a sequence, but failry chanllengin to recall something in the middle
Term
skill acquisition:
Definition

-speed anc accuracy INCREASE with PRACTICE

-SKILLS show a very high level of RETENTION 

Term
Shannon
Definition

-related to expertise

-the investigation of the chess-playing problem is intented to develop techniques that can be used for more practical applications (ex. war)  

Term
posterior probability
Definition
-probability that a sample has been drawn from one populatoin rather than from another
Term
law of small numbers
Definition
-even small smaples are highly representative of the populations from which tehy are drawn
Term
the illusion of validity
Definition

unwarranted confidence which is produced by a good fit between the predicted outcome and the input information

-the internal consistency of a pattern of inputs is a major determinant of one's confidence in predictions based on these inputs  

Term
regression towards the mean
Definition

after an really bad performance, you tend to perform better, or RISE UP to the NORM. opposite when you do well, you FALL BACK to the norm

ex. pilots

-failure to account for regression leads one to overestimate teh effect of punishment and underestimate the effect of rewards  

Term
availability
Definition

-people asses the probability of an event by the ease with which instances or occurences can be brought to mind

ex. heart attacks associated with acquintances with heart problems (recall of these instances)  

Term
biases due to the retreivability of instances
Definition
-a class whose instances are easily retrieved will appear more numerous than a class of equal frequency whose instances are less retrievable
Term
biases due to the effectiveness of a search set
Definition

-most people judge words taht begin with a consonant to be MORE NUMEROUS than words in which the same consonant appears in the thrid position

-also, frequency of words is judged as relatively more numerous than concrete words   

Term
biases of imaginability
Definition

-one generates several instances and evaluates frequency-probability by the ease with which the relevant instances can be constructed

ex. assessing risk of future adventure might depend on how easily you  can imagine-up difficulties you may encounter 

 

Term
illusory correlation
Definition

-people tend to overestimate the frequency of co-occurence of natural connections

ex. naive judges presented pictures of mental patients; later had to recall how many pics had suspicious looks on their faces and the numbers were OVERESTIMATED

AVAILABILITY can also explain this; suspiciosuness at an odd drawing of the eyes is due to the availability of the IDEA that suspiciousnerss is linked to eyes  

Term
anchoring
Definition

-choosing a starting point and then adjusting it to find the right answer

-different starting points yield different estimates, which are biased towards initial values  

Term
subjective probability
Definition

-the quantified opinion of one person

-determine preferences among bets but are not derived from them

-note: any set of internally consistent probability judgments is as good as any other  

Term
normative approach
Definition

- approach to decision-making

-decisions are made based on past considerations and preferences rather than on experimental observations.

-this has to do with the RATIONAL THEORY OF CHOICE (a theroy flaweD)  

Term
descriptive approach
Definition
-decisions made based on empirical observation and experimental studies of choice behaviour
Term
loss aversion
Definition
refers to tendency for people to prefer avoiding losses than acquiring gains
Term
risk aversion
Definition
having a preference for a sure outcome over a risky prospect that has higher or equal expected value  (appears more with choice involving GAIN)
Term
risk seeking
Definition
-having a preference for a risky prospect over a sure outcome that has higher or equal expected value (appears more with choice involving losses)
Term
utility
Definition
how peopel make decisions under conditions of uncertainty
Term
concave function of money
Definition

gain or loss has a subjective value depending on how much money you start out with

-a 100 dollar "sure thing"/gain appears to have more subjective value than a $200 dollar risky gain 

-however, in a CHOICE INVOLVING LOSS, most people prefer to take an even chance at losing 200 or nothing than losing 100 dollars "sure thing"  

Term
prospect theory
Definition

-observes regularities in risky choices. 3 properties

1. defined on gains and losses rather than total wealth

2. ti is steeper for losses than it is for gains

3. it is CONCAVE for gains, CONVEX for losses  

Term
framing effects
Definition
the same problem framed in alternative ways leads to different answers
Term
dominance principle
Definition
-if option B is better than option A, one one attribute and at least as good as A on all the rest, then B should be chosen over A
Term
description invariance
Definition
-an individual's preference between options should not depend ont he manner in which tehy are descirbed, provided the descriptions contains the same information (relevant to "framing effects")
Term
expertise approach
Definition
-specific ACQUIRED characteristics underlie outstanding performance
Term
stability constraints
Definition

outstanding behaviours are attribtued to relatively stable characteristics of the individual

-stability constraints eliminate achievements due to unique environemntal circumstances 

Term
stable characteristics
Definition
can only be assessed by determining the unique situation of the individual and by observing performance in standardized situations
Term
Galton
Definition

proposed individuals gain eminence/position of distinction in the eyes of others due to a long-term history of achievement. achievement is based on natural ability and personal motivation.

EMINENCE is genetically determined  

Term
study of expertise
Definition
-seek to understand and account for what distinguished individuals in a domain from less outstanding individuals in that domain
Term
behaviour
Definition

 

--- is either predominately influenced by inherited qualitties or is a funciton of learning and acquisition 

Term
outstanding performance
Definition
is attributed either to some general characteristic of the individual or to a specific aspect
Term
inherited characteristics
Definition

-general abilities: ex. intellignce or personality

-specific abilities : music and artistic abiltiy, body building ex. being able to draw 

Term
acquired characteristics
Definition

-general learning and experience (acquired)

-domain-sepcific training and practice (acquired)  

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