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Forthepastseveralyears,theSundaynewspapersupplementParadehasfeaturedacolumncalled“AskMarilyn。”PeopleareinvitedtoqueryMarilynvosSavant,whoatage10hadtestedatamentallevelofsomeoneabout23yearsold;thatgaveheranIQof228—thehighestscoreeverrecorded。IQtestsaskyoutocompleteverbalandvisualanalogies,toenvisionpaperafterithasbeenfoldedandcut,andtodeducenumericalsequences,amongothersimilartasks。SoitisabitconfusingwhenvosSavantfieldssuchqueriesfromtheaverageJoeas。What’sthedifferencebetweenloveandfondness?Orwhatisthenatureofluckandcoincidence?It’snotobvioushowthecapacitytovisualizeobjectsandtofigureoutnumericalpatternssuitsonetoanswerquestionsthathaveeludedsomeofthebestpoetsandphilosophers。
Clearly,intelligenceencompassesmorethanascoreonatest。Justwhatdoesitmeantobesmart?Howmuchofintelligencecanbespecified,andhowmuchcanwelearnaboutitfromneurology,genetics,computerscienceandotherfields?
ThedefiningtermofintelligenceinhumansstillseemstobetheIQscore,eventhoughIQtestsarenotgivenasoftenastheyusedtobe。Thetestcomesprimarilyintwoforms:theStanfordBinetIntelligenceScaleandtheWechslerIntelligenceScales。Generallycostingseveralhundreddollars,theyareusuallygivenonlybypsychologists,althoughvariationsofthempopulatebookstoresandWorldWideWeb。SuperhighscoreslikevosSavant’sarenolongerpossible,becausescoringisnowbasedonastatisticalpopulationdistributionamongagepeers,ratherthansimplydividingthementalagebythechronologicalageandmultiplyingby100。Otherstandardizedtests,suchastheScholasticAssessmentTestandtheGraduateRecordExam,capturethemainaspectsofIQtests。
Suchstandardizedtestsmaynotassessalltheimportantelementsnecessarytosucceedinschoolandinlife,arguesRobertJ。Sternberg。Inhisarticle“HowIntelligentIsIntelligenceTesting?”,Sternbergnotesthattraditionaltestsbestassessanalyticalandverbalskillsbutfailtomeasurecreativityandpracticalknowledge,componentsalsocriticaltoproblemsolvingandlifesuccess。Moreover,IQtestsdonotnecessarilypredictsowelloncepopulationsorsituationschange。ResearchhasfoundthatIQpredictedleadershipskillswhenthetestsweregivenunderlowstressconditions,butunderhighstressconditions,IQwasnegativelycorrelatedwithleadership—thatis,itpredictedtheopposite。AnyonewhohastoiledthroughSATwilltestifythattesttakingskillalsomatters,whetherit’sknowingwhentoguessorwhatquestionstoskip。