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order.Alderson(1984:11)concludesthattheucorollaryoftheparallelprocessing
theoryisthattheknowledgeoftheforeignlanguagewillaffectthedevelopment
oftheforeignlanguagestrategies:thelessoftheforeignlanguageyouknow,the
morelikelyyouaretoreadasinyourrstlanguage.”Teissueofcross-linguistic
variationsinsentenceprocessingisdiscussedinSection2.4.below.
Similarly,GrabeandStoller(2002)consideralevelofL1readingabilitiescrucial.
Teyclaimthat
studentswhoareweakinL1literacyabilitiescannotbeexpectedtotransfermanysup-
portingresourcestoL2readingcontexts.Tetypesofabilitiesthatstudentsuseintheir
L1readingrepresenttheupperlimitofwhatcanbeexpectedforlinguistictransfer,stra-
tegicpractices,problem-solvingexperiences,taskcompletionskillsandmetacognitive
awarenessofreadingprocesses(GrabeandStoller2002:56).
1.3.ConsolidatingtheLinguisticThreshold
andtheLinguisticInterdependenceHypotheses
BernhardtandKamil(1995)reviewedthestudiesinvestigatingthecontributionof
L1readingandFL/L2proficiencytoFL/L2reading,andobservedconsiderablecon-
sistencyintheamountofvarianceaccountedforbyL1reading(from20%upwards)
andFL/L2proficiency(from30%upwards),withFL/L2proficiencyconsistently
amorepowerfulpredictor.Teypointedoutthatmoststudiesleave50%ofthe
varianceinFL/L2readingabilityunexplained.
Readingstudiesconductedattheendofthe20thcenturyindicatethatboth
rstlanguagereadingabilityandforeign/secondlanguageproficiencyhavesignifi-
canteffectsonforeign/secondlanguagereadingability,e.g.,Bossers(1992,cited
inAlderson2001),Carrell(1991).Aninterestingconnectionbetweenthelevel
ofFL/L2knowledgeandFL/L2readingwasobservedbyBossers,whofoundthat
FL/L2knowledge(especiallyvocabularyknowledge)wasstronglyrelatedtoFL/L2
readingcomprehensionatalowerlevelofFL/L2proficiency.Teresearcherfound
thatonlyuatrelativelyadvancedlevelsofL2proficiencydidfirst-languagereading
abilityprovetobethesolepredictorofsecond-languagereading”(Bossers1992,
citedinAlderson2001:39).Similarly,Block(1986)observedthatproficientFL/L2
readersperformedsimilarlytoproficientL1readers;lessproficientFL/L2readers
performedsimilarlytolessproficientL1readers.Block(1986:336)concludedthat
ustrategicresources,thus,seemmoreimportantthanspecificlinguisticknowledge
forthesereaders.”
Inarecentstudy,vanGelderenetal.(2007)contributedconsiderablytothe
resultsdiscussedabove.Inalongitudinalstudy,theresearchersinvestigated
theeffectsofmetacognitiveknowledge,languageknowledgeandprocessingskills
onL1(Dutch)andFL(English)readingcomprehension.Teresearcherslookedat
thedevelopmentof13-year-oldadolescentsoveraperiodoftwoyears(fromgrade
8tograde10).TendingsindicatedhighandgrowingcorrelationsbetweenL1
andFLreadingcomprehension.L1andFLreadingcomprehensionprovedtobe
highlyrelatedtoeachotheratthebeginningofgrade8;thisrelationshipbecame
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PartI:Essentialcomponentsofreading-across-linguisticapproach