what is intelligence ?
there is no clear cut definition of intelligence. Even today, scientist can’t agree on the precise definition of intelligence.
Intelligence : Sensory capacity
Galton : he thinks is a by-product of sensory capacity.
He reasoned that most knowledge first come through the senses , especially vision and hearing.
Hence he thought that people with for example better eye sight , should acquire more knowledge than other people.
Obviously , this is not correlated whatsoever to overall intelligence.
Intelligence : Abstract thinking
french government got Binet + Simon to develop an objective psychological test that would identify students who might require additional instruction on certain scholastic abilities.
They developed the first intelligence test. ( a diagnostic tool to measure overall thinking ability.)
most experts agree that whatever intelligence is , it has something to do with abstract thinking
What was in the diagnostics test ?
completing incomplete sentences, determining the similarities between 2 objects ( how are dog and rose alike )
and constructing a sentence from 3 words
abstract thinking what is it ?
the capacity to understand hypothetical concepts , rather than concepts in the here and now.
In1921,Americanexpertslistedtheir
definitionsofintelligence.
what is it ?
Commonfactorswereabilitiesto:
◦ Reasonabstractly (think about things that are not concrete ideas
◦Learntoadapttonovelenvironmentalcircumstances ◦ Acquireknowledge (• not just about learning stuff such as languages or history but also about learning how to ride a bike )
◦ Benefitfromexperience (learn from past mistakes)
intelligence as general or specific abilities
PositivecorrelationsamongallitemsonIQtests
ledtoSpearman’sdevelopmentofg ands in order to explain the results:
• Generalintelligence(g)accountsforoverall
differencesinintellectamongpeople
•Ourparticularskillsarereflectedinourspecific
abilities(s) (such as spatial problems, examining the location of objects in physical space)
Even if a person is really smart, high in overall g , they may flunk physical space test because they are deficient in spatial problems. (due to lack of experience with them or not adept at spatial task)
Intelligence : Fluid and Crystallized intelligence
• CattellandHorntheorizedthat
“intelligence” isamixoftwocapacities:
•Capacitytolearnnewwaysofsolving
problems,orfluid intelligence
We rely on fluid intelligence the first time we try to solve a puzzle we’ve never seen or the first time we tried to operate a vehicle.
•Accumulatedknowledgeoftheworld
wegainovertime,orcrystallized
intelligence
We rely on it to answer questions such as “What’s the capital of Italy? “
Multiple intelligences :
Different ways of being smart.
Severaltheoristsarguethatthereare
entirelydifferentdomainsofintellectual skill
• Gardner’s“framesofmind” –numerous (different) waysof
thinkingabouttheworld
• Arguedthatautisticsavantsprovided
supportforthesedifferenttypesof
intelligence
Multiple intelligences : is there mixed scientific reaction , if so why ?
because :
- virtuallyimpossibletofalsify ( Gardner’s model is vague and difficult to test . In addition, he haven’t formed any formal test to measure his intelligences )
◦ notclearwhycertainabilitiesclassifyas
intelligences,whileothersdon ’t
◦nogoodevidencethattheseintelligencesare
trulyindependent
Triarchic model
Sternberg argues that there more to intelligence than just g.
Sternbergtheorizedthreelargelydistinct
typesofintelligence
• Believesthathavingonedoesnotensureyou
havetheothers
What are the three intelligences of triarchic model ?
• Analyticalintelligence istheabilitytoreason
logically,or“booksmarts” (closely related to G)
• Practicalintelligence istheabilitytosolvereal worldproblems (especially those involving other people) ,or“streetsmarts”
• Creativeintelligence istheabilitytocomeup
withnovelandeffectiveanswers to questions.
so kind f intelligence in which we need to find new and effective solutions to problems.
all three overlap with each other.
Weaknesses of triarchic model
Hasseveralweaknesses
•Practicalintelligenceisnotindependentofg (may be a specialized subtype of g)
•Causalrelationshipbetweenjob
performanceandpracticalintelligence (stenberg’s work-related measure of practical intelligence may actually be measure of work knowledge (p.334) )
• Weallpossessstrengthsand
weaknesses,buttheymightnotbeas
distinctastheorized
BiologicalBasesofIntelligence
Brainvolumecorrelatespositivelywith
measuredintelligence(between0.3and 0.4)
(not sure whether these findings reflect a direct causal association. Perhaps bigger brains lead to higher intelligence. Could have a third variable, like better nutrition before or shortly after birth , leads to both. )
• Moderatecorrelationdoesn’t explainall,
andmaynotbedirectlycausal
• Evidencesuggestscerebralcortex
developmentissloweringiftedchildren
(highly intelligent 7-years old, have a thinner cerebral cortex than other children. The cortex of these children then thicken rapidly , peaking at about age 12)
BiologicalBasesof Intelligence
Intelligencemayreflectefficiencyof
mentalprocessing
•
Workingmemoryisalsocloselyrelatedto
intelligence
Centraltheme:Speedofinformationprocessingis
tointelligence
• Prefrontalcortexisespeciallyactiveduring
highly“g‐loaded” tasks ( brain region that plays a key role in planning, impulse control and short term memory)
◦ Butotherareasofthebrainarealsoimportant,i.e.parietalcortex
(spatial abilities )
TestingIntelligence
Unfortunately,wecan’tjustaskpeoplehow
smarttheyare
• Self‐reportsonlycorrelate0.2to0.3with
objectivemeasuresofintelligence
Calculating IQ
•Thedevelopmentofnormsallowustocomparea
person ’sresultsonatesttoothers
• Binet’sconceptofmentalageledtothe
developmentoftheintelligencequotient(IQ)
Mentalage /Chronologicalage X100=IQ
Thisworksforchildren,butnotadults (once we hit 16 years old , our performance on IQ tests item doesn’t increase by much. This formula would result with everyone’s IQ getting lower and lower as they get older. )
• ModernIQtestsuseadeviationIQthat
eliminatesageeffects
• Compareseachpersontowhatisnormalforhis
orherownagegroup
(IQ of 100 = in the norm range
IQ of 80 = below average
IQ of 120 = above the norm )
EugenicsMovement
•SoonafterIQtestsweredeveloped,theiruse
begantobeabused (began to use them on new North american immigrants. who barely knew the language. hardly surprising that 40% of them were classified as having an intellectual disability)
• Ledtoworryabout“lowIQ” incertaingroups (immigrants ),andtheeugenicsmovement
(eugenics = was the effort to improve a population genetic stocks by encouraging people with “good genes” to reproduce and discouraging people with bad genes to reproduce.
•Forciblesterilization of low IQ ppl (they say they needed removal of their appendices but actually remove their sex organs) andimmigrationlaws (ppl from low iq countries weren’t allowed to migrate to canada) were
mostvisibleimpactsonsociety
IQTestingToday
MostcommonlyusedIQtestforadultsisthe WechslerAdultIntelligenceScale(WAIS) Consistsof15subteststhatgivefivescores: • OverallIQ • Verbalcomprehension • Perceptualreasoning • Workingmemory • Processingspeed
OnwhichcontinentisFrance?
Exampleof:
InformationTest,tapsgeneralrangeinformation
Whydopeopleneedbirthcertificates?
Exampleof:
ComprehensionTest,testsunderstandingofsocial conventionsandabilitytoevaluatepastexperience
Howmanyhourswillittaketodrive150miles at50milesperhour?
Exampleof:
ArithmeticTest,testsarithmeticreasonthrough verbalproblems
Howareacalculatorandatypewriteralike?
Exampleof:
SimilaritiesTest,asksinwhatwaycertainobjectsor conceptsaresimilar,measureabstractthinking
Whichthreeofthesepiecesgotogethertomake thispuzzle?
example of ..
VisualPuzzlesTest,testsabilitytoorganizeparts ofafigureintoalargerspatialarray